Toronto is without any doubt the most multi cultural city within Canada. It is the largest city in Canada and consequently it can absorb more people than any other city at the moment.
In a few years that may change. There are signs indicating that the services within the city of toronto will be stretched to their limits in about 8-10 years. When the quality of life starts to lower, other cities will start picking up
Also, and perhaps most important, Toronto produces the largest share of the GDP in Canada. That said, most companies in Canada have an office in Toronto where they do most of their businesses, which of course translates in more jobs than anywhere else (with the exception of the oil boom in alberta)
