ironically, the idea at the time was that canadians were ideal call center employees for the american market because we were cheaper (due to our dollar being around $0.60 usd at the time, which has since changed drastically) and we spoke english that americans could understand - unlike asians or latin americans.
but, i have to be honest - i would personally have a much easier time with an asian accent than i would with a deep south one because, while asian accents might be broken, they're not a structurally different language. the feeling was sometimes mutual - not just "aboot. hahaha.", but "i don't understand what you said because your grammar is foreign to me".
it really surprised the hell out of me, actually. i think i learned that we're not that far from "deep south american" being a different language than "english".
you, on the other hand, just speak a bit slower than i do.