When I rode a recumbent, I was being drafted down a nice hill by another commuter. I didn't mind, I understand the dynamics. After all, it's not a race.

Geese fly in a "V" for the same reason.

When he finally passed, he told me, "nice bike."

I don't see a big commuting advantage drafting, unless it's a bus or a truck, where you can get major speed going for big flat stretches. But it can be dangerous, too, so be advised on that.

I usually only hang behind another cyclist when passing doesn't seem beneficial.