It's comments like these that make Ontarians elsewhere in the province (800,000 in Northern Ontario, 300,000 in Simcoe and Muskoka, 1.6 million in Eastern Ontario (including over 900,000 in the City of Ottawa alone), 2.5 million in southwestern Ontario (London, Windsor, Waterloo)) feed into the self-centred Torontonian sterotype they resent.
There are more than 5 million Ontarians (out of 13 million in total) not in Toronto or the 905. That is nearly 40% of Ontarians. Ontario less the 905 and 416 would be the third largest province in Canada, after Quebec and the GTA. Clearly the 905 is not "nearly every Ontarian" outside of Toronto.