O'RLY?
In the linked article it is written that the USA use the same system... except for the 1pint=16oz and the US gallon (ounce, quart,...) actually being quite smaller than the proper imperial one (right? too lazy to check w'pedia)...
To be honest, I like my beer in the correct size (though the way it is done in Cologne also has its advantages, get a fresh one without asking all the time - but they are only 0.2l)