I think in general most of the people who own an n9 and are on these forums are VERY forgiving....maybe it's just a love of open source, or the nostalgia of the n900 has still got them enchanted but this phone has MANY MANY problems. Lag is the least of the worries with it I think I've mentioned before.
These days I have no patience for products that don't 'just work' the n9 is one of those to me. I'm happy for those that haven't encountered problems, that's great to hear.
I do think it ironic when ppl on here hate on android then are all excited when ICS gets ported. Just get an android, it's the best...by far