Well, you'd be suprised to find out that a large majority of beers in the UK are of a Canadian origin (hey, I work part-time behind a bar, I read the paper receipts when collecting a delivery....sometimes!!!) I mean, You would be SHOCKED that virtually nobody knows here that Carling is a Canadian brand.
I get punters come up asking for a "Carlsburg please", pointing to the Carling, to which I ask "you mean Carling right?, one's Canadian, the other's Danish?"...to which most of the knuckle-draggers just moan or say "yeah I knew that uh-hu"..pondlife really.
I personally found most US beers to be as weak as tap-water, I likened the expereince to being in egypt....drowning in the nile!!!......they have certificates for their beer in the US of A....I should know, I've had a few days off with it too!!!.
Nah, the best Beer I ever tasted would probably be a Romanian brand called Ursus (in Romania funnily enough). Spitfire Bitter from the Badger Brewery round my way isnt too bad either.