From the article:
Canadian stereotypes exist for a reason! In a lot of cases, they're absolutely true. Trevor exhibits none of the stereotypical traits. Amoung other things, he's not kind, considerate, patient or polite. In fact, in one "Rampage" mission he guns down an onslaught of US military men because they make fun of his accent and the whole "aboot" thing. While it was a bit of a warped power fantasy to lay waste to people making fun of Canadian "accents" -- my God, no one up here actually hears an accent, unless the person talking is from Newfoundland -- I've never felt the need to take up arms as a result of sniggering comments aboot how I pronounce certain words.