Well, if he has a degree, it doesn't really matter to any airlines where he gets his training done. It would be best if he went to Seneca College, Sault College or any of the other well respected diploma granting schools, but if he just wants to build time and get his licenses and ratings, then any school will do. The key is the instructor, in my opinion. So depending on where in Toronto he is, he may look at the 2 or 3 closest schools and compare. I personally fly out of Burlington Airpark with Spectrum Airways. It doesn't have the same reputation as the other airports nearby, but I'm very happy with my instructor, and I feel that's the main thing.
With the big schools at the big airports, you're also looking at higher costs, some direct, others not. For example, an indirect saving I get from Burlington is the taxi time and the flight to the practice area are very short, saving on aircraft rental.
is the website for Brampton Flying Club
is for Spectrum Airways in Burlington
There is also ATI at the Toronto Island Airport (parking and ferry fees are high though), and there is also Markham Airport.
I hope this is somewhat helpful, and it's not too much information.
"it's kind of like an Airbus, it's an engineering marvel, but there's no sense of passion" -- J. Clarkson re: Coxster