Highest speed on my commute has been around 30/31mph on a brief downhill on Spadina towards Queens Quay. Usually don't hit over 25mph though. Current commute means no more than 21/22mph unless I really really gun it (which I haven't yet).

Fastest average I think has me at about 16mph, but right now even with my short commute I don't get much more than 13, usually around 12 - pretty badly out of shape/out of conditioning particularly my cardio - the wind going across the lake sucks the breath right out of me most times.

Fastest recorded speed I had until my battery dislodged was 36.6mph, wasn't part of a commute and was down a fairly steep incline which I hammered it down - I'm convinced I can hit 40mph given the chance, even on my el cheapo bike