Where? Did anywhere in my post say that an iron rush player can't expand? The german attack will take more time and therefore can setup additional cities is all I said. I never said anything at all about the expansion of the iroquois.
*sigh*
By stating that the German player can set up
additional cities (with the implied object being that the Iroquois cannot), you implicitly stated something about the expansion of the Iroquois. Let G be Germany and I be the Iroquois. Then in mathematical form, you stated that G > I along the dimension of expansion. To be precise, you stated in the first post that Germany can get to a second city (or a third with Liberty) by going for Civil Service, with the apparent implication being that the Iroquois can't. Your clarification confirms that you meant to state that G > I along the dimension of expansion. Therefore you logically claimed that the Iroquois can't settle more than one city, or two with Liberty, and still Iron rush.
If you didn't mean to state that, it's fine. Mistakes happen. But please don't get ticked off at me when you make a mistake and I tell you that your claim is silly. I can't know that you made a mistake until you inform me of such.
Did I say that? Did I say the germans are better?
No, your claim was that the Germans were roughly equivalent. Your very first sentence advanced your thesis. "I'm not sure that it's so clear cut" is a logical statement claiming that G ~= I in opposition to my claim that I > G. Your post then goes on to make statements to support the claim that G ~= I.
So instead of asking questions politely about posts that you didn't understand fully, you choose to insult the poster.
First of all, I understand the logic of your post perfectly, as evidenced above. There is no need for questions because the logic of your post is crystal clear. You may not have intended to initiate an argument on the subject. I can understand that. But if I advance the thesis A, and you advance the opposing thesis ~A, you shouldn't expect me (or anyone else) to accept your position that ~A is correct without further debate.
You should recognize that there's a clear difference between attacking the poster and attacking the argument. The issue in the other thread you reference was that the precise phrasing selected by another poster indicated a challenge to my personal integrity, not a challenge to my arguments. It was entirely possible to construct that challenge as a challenge to my arguments - which you did quite nicely in that thread, I might add - but the poster in question chose not to do so. Moreover, it wasn't the first time that had happened with me, and I'm not the only person the poster has pulled that stunt with.
Don't be so quick to judge when you don't have all the evidence.
The German UA saves you maybe 10 GPT when you have 10 Swordsmen straight off, and it just gets better from there.
I don't think that those units cost 4

each to maintain during Classical/Medieval. If I recall correctly, they cost no more than 2

on average at that point in the game, and I want to say it's more like 1-1.5

. It isn't until Industrial and Modern that I start noticing deleted units saving me 4

in maintenance per turn and up. Am I missing something here?
If not, a 25% discount on maintenance yields 0.25 X 10 X 1.5 = 3.75

per turn, which isn't any better than what you've posited for the Iroquois ability at that point. Further, I don't think it's totally unreasonable to suppose that they scale roughly equivalently until Industrial or so, with the balance perhaps breaking mildly in favor of the Germans.
Now, if this is another example here of fail documentation by the devs and the Germans actually pay 25% total unit maintenance cost rather than 75%, that would be something indeed.
The Panzer is sufficiently powerful and speedy to allow you to snatch a runaway Civ's capital when it's on the verge of winning by Diplomacy, even when you are behind in tech. If it's the only Civ with a capital left, that's a Dom win snatched from defeat.
It's not terribly common for this to happen, but it is possible.
I absolutely agree (hence the hedge "very likely" in what you quoted), but I look at this much like Germany's UA itself. One might argue that the UA is awesome because you'll get seven Warriors from the first seven barb camps you fight once in every 128 times. In this case, the attractiveness of Panzers is more limited because they generate a win once in a blue moon and have a value of zero towards generating a win condition otherwise.
That's what's classically meant by the shorthand "arrives too late to matter" when describing a late UU. By virtue of arriving on the scene so late, the late UU has to immediately generate a winning position where one would not otherwise exist in order to matter. By contrast, if an early UU helps you, say, capture a single city that you otherwise would not have, the large number of remaining turns in which to earn those benefits can have a very significant effect on your ability to set up a win condition later.
Moreover, if you're not on Pangaea, it's often not feasible to land on an enemy continent with a large, powerful Civ and take over before Industrial and the Panzer makes a fantastic showing in Industrial Era battles, even under the shadow of Artillery.
Here I'd argue that in a game with multiple major landmasses you never need to play for a Domination win. On lower difficulties you can ignore the AIs; on higher difficulties you're good once your continent is pacified. That means that you can optimize for

very early on and achieve a peaceful win condition fast enough with certainty.
The games that are tricky are the ones where you're surrounded by hostiles out for your blood, because you are forced to make so many early sacrifices simply in order to weather the initial storm.