^
Haha. Sometimes, I have such a bad attitude.
Just ignore it. Sometimes, I wonder if I have a mood disorder...
But sometimes, you should be more respectful and less haughty in the way you present your counterattack.
I could give you lessons in having a nice, friendly attitude towards others on the internet if you're interested... <3 <3 <3.

.
Anyway, the problem with an AI choke ---> iron rush is the following:
1. You have to get some choke units ASAP, and unless you want to risk AI settling for (or maybe even ON) copper you have to get them early. This has an impact on early worker/settler production of your own.
2. You are going to have to shore up defenses further, in case of AI wandering archers and also barbs now that your spawnbust units are occupied.
3. These units outside of your territory have a significant cost.
4. AI spams the ***** out of archers, which means you have to engage in some masterful baiting tactics to expose them and then stick your sword (er...jags) on them between cities to whittle their numbers.
5. Choked cities are only marginally better than settled cities, because they won't have wonders, great infrastructure, or a normal amount of tile improvements (you DO want to allow less archer spam after all).
These things add up to a pure choke being somewhat suboptimal. Now, if you can lullerfarm 6 workers off this sucker or it's a desperate situation enough to merit that, such can be fine. However, jags as a pure bum rush unit are not consistently viable to any significant degree more so than a stock sword rush + choke is consistently viable. The constraint is frequently not iron in such a scenario anyway.
I don't find choking to be significantly better in kmod actually. In fact, it's probably worse since they'll actually attack your choke more often ^_^.