Not sure why I got a down vote for this. Probably as it's anecdotal? What I should have said: from my experience Chrome feels snappier with Javascript performance at least while playing typeracer. And I read into that, that JS games perform better under Chrome.

I wouldn't worry about random downvotes, no karma system works. 'snappiness' is a potential driving factor for Chrome use. I'll try and do some research on users at some point.