Why does Toronto have more "street-based" neighbourhoods than other Canadian cities?

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I've heard people from Mt. Pleasant say "Main Street" as their neighbourhood, as well as Mt. Pleasant. I never hear people say "Riley Park", which is another neighbourhood up Main (between 16th and 41st), so I would imagine those people just say "Main Street".

Technically, Olympic Village is in Mt. Pleasant, but people who live their will identify "Olympic Village" as the neighborhood they live in. Mt. Pleasant covers a large area.