Iris, almost the same thing happened to me on the ride home last night. About halfway home I met up with another commuter - on a road bike, no less. Almost all of the commuters I see are on moutain bikes and going the opposite direction.

Anyway, she was a bit faster than me but we caught up at intersections. Thought we had parted ways at one point but then she caught up with me at the last intersection. Seems she went a different route to avoid a big hill.....

And then another person caught up with us while we were waiting at the intersection....so cool!