In the UK it's a bit further along in terms of drink driving tolerance IMO. There's a real stigma for those that do/try it. About 1 unit and change is the legal limit and the tolerance of the public limit. If you try more than that you might as well kick grannies and puppies. I don't speak from experience of any of those things
I wouldn't mind seeing a bit more of that permeate over here. (I'm not being judgemental though)
Anyway, having only passed my canadian lisence for a little over a year, I got that pesky graduated lisence that has 0 tolerance blood alchohol level and they'll take the lisence away. That's fine by me but what if I have a beer in the morning, and go out at 11.00 at night and there's still a trace do they rip it up then?
I just don't drink if I drive period and probably follow that even if i could have one or two.