Re: Bloor/Ossington > Humber College (15' break plus two minor wrong turns) ... 2'05" by my watch.
Here's the (40k round trip) route:
http://www.gmap-pedometer.com/?r=1739368
It takes me an hour either way on transit. By bike took us an hour to get there as well and only 50 minutes or so to make it back.