I second Pesar's comments. From what I have been told by senior faculty, who received PhDs in the US, is that McGill is widely considered a great school in academia but my impression is that its public perception is a bit more dubious. UBC, McGill and possibly Toronto are the most recognizable schools internationally in Canada is my impression. York and Western are regional schools in Canada and I wouldn't expect their reach to be wide in the US.
For Pesar's it depends on what "top-ranked" American programs you are comparing McGill to. What are your choices? Btw, my program is political science.