Preferences vary on both sides of the Atlantic. Another comment on this post complains that Americans pour beer wrong because they _do_ pour with a head.

> Also in the US (probably due to lack of training and the customer too embarrassed to complaining) tend not to fill it the brim (and so not even 16''). I've seen 2-3 inch heads and asked them to top it up. They look at me as if I've just insulted George Washington