Dicho, I hate to be pedant *G*...but...

this link seems to support the theory for a difference in American and British/Canadian punctuation preferences. I'm not sure about this particular link, but there were several when I searched on Google for British/ quotation/ marks.

The only reason I noticed this (NO, I'm really not a pedant) was that I was doing some proofreading for an Irishman and this just about drove me crazy.