There have been quite a few polls showing such trends for a while.
This is an oldie, for example.
He also lost by a very wide margin in the Beaches and in Rosedale, which are famous for having the lowest percentage of visible minorities in the city, and the greatest share of 'heterosexual white' people. In Scarborough, meanwhile, where visible minorities dominate, Ford won almost every single ward by a margin of 20-40% of the vote!
Polls have also indicated time and time again that most university-educated people (which applies to most of the white upper-middle-class) disapprove of Ford, while those who have only primary education or less overwhelmingly support him. Another one in the Star last year showed that Ford's approval ratings are highest among low-income households, and decrease substantially as you climb up the income ladder.
Sure, there must be a bunch of Ford-like people in Etobicoke who identify with him, but the majority of his supporters likely belong to low-income minorities.