This is part of the issue; the GTA is solidly in the east (the centre of Canada is in Manitoba), but when someone says, "eastern Canada", one automatically thinks "Nova Scotia", but Toronto is a relatively short drive from New York City. That being said, I understand that in most cases, "central" is referring to population, industry, finance (not fashion - that's Montrėal).
Regarding the site, the exhibit's producer, Zbigniew Stachniak, wrote an excellent book [0] on the world's first truly portable computer: the MCM/70 - which ran APL (yay!).