That view is facing east with Yonge St at the intersection. I've been on the Yonge north and south there many more times than Wilson/York Mills so can't make a useful comparison. Usually I just lean forward and coast down. The one time I did my daredevil routine drafting behind an over the speed limit truck my computer malfunctioned giving a reading of 56 mph/ 90 Km. Strange intersection being the bottom of a bowl shape. Was hit by a small meteor long ago?
I went up and back down it one week ago today with no traffic on it (I woke up too early and couldn't go back to sleep). I'm certain the lens used for that photo is telescopic and the result is a compressed look which is misleading. It's quite long but not especially steep. I went up it like nothing and slightly braked down much of it. Now if I had sprinted down it maybe an impressive speed could have been had but I'm sure the fine folks at the bus stop near the bottom would have been simply more baffled.