Do Americans use twice? I only ask as phrases such as "Seven Time winner of the Tour de France" are creeping into UK usage and really annoy me (surely it should be seven times winner...) but to say "two time winner of..." beggars belief when "twice winner of..." says it all. Mind you I'd find it odd to hear "thrice winner..." but it would make my day. (Once, twice, thrice a lady anyone?)

I'm glad it seems to be a two way street. Are some of the Britishisms appearing in the USA due to the Harry Potter books (e.g. snog) or where they all translated out in the US editions?