Try to make it as readable as possible but a few mistakes can just make it look like you're a non-native English speaker and I don't really think Google will slap you because you don't speak English well, lol.so 400 words is to short for AMR?
when you say you dont care as much for redability for web 2.0 pages does that mean it makes no sense at all or your ok with mistakes inside of it but pretty readable?