Since there doesn't seem to be any data describing the commuting habits of the super-rich, I'll throw in my unscientific observations as well. The vast majority of middle and upper middle class people I know (most of whom live in the former City of Toronto, not suburbs) take transit to work, even if they own a car. It's faster (if you live on a subway line), and gas is expensive. The handful of rich-beyond-my-wildest-dreams people I know all drive from their condos in Yorkville or houses in Forest Hill to their jobs in the Financial District. When money isn't a consideration, I think people who are used to being constantly comfortable will opt to drive. Call that entitlement, call that laziness, whatever.