Research shows that over 25% of MMORPG players play for less than 10 hours per week. Sounds fairly casual to me.

Naw, it's just that they know everybody in Calgary does 10 over anyway, and plan their speed limits / light timing accordingly.

It all depends on the transit system where you live. Here the bus is never early, and is usually a little late. I typically get to the stop about the same time that the bus is supposed to arrive, so often times I end up having to run the last block. Having my watch off by up to a minute because I haven't reset it recently is a real pain.
Sure I could leave extra early to compensate, and often did when my watch wasn't reliable, but I don't like to do so.