That's very cool. So you just resign yourself to low tech, but national college will still eventually get you rifling (though you'll never get infantry!). The longsword invasion needs to give you enough beakers through captured cities to get to riflemen I expect.
Also, you will have lower production than a civil service player. However, he will likely be wasting many hammers on city improvements, while you gamble with full military.
I don't think it would hold up on continents w/ good teching opponent on other continent. You might have trouble getting to astronomy, and will likely be unable to get past other player's naval defense. If he gets research labs first, he will win.
You will likely get domination on pangaea very effectively with this.
I usually avoid Honor, because I find Piety -> Theocracy makes for a much better economy for any 5 city+ civilization. Then again, Theocracy takes 3 policies which is very tough, since its usually #3-5 (oracle or stonehenge usually required). However, adding that GG does make things much easier (and allows for a golden age with the first spawned great general). So I agree with Honor, overall for this strategy, since building a wonder would slow this down too much.
Why do you say it is impossible to grow that fast with human opponents? I find it is equal- just DOW every opponent by killing their scouts/warriors, so you dont have to worry about worker steal or settler snipe.
Best case scenario: 2 horse in capital with turn 1 pop ruin, turn 3 culture ruin

I think its 3 or 4 turn settlers.
Do you prefer delaying until after the conquest of some puppets, such that the golden age affects puppet income?