Hmm, I lost five pounds in the last 6 months, but added some weight to my commuting bike probably equal to my personal loss. I added new wheels - a dynohub in front and an IGH in the back along with fatter tires along with some other accessories. I find that my commute takes slightly less time now (same route).

While I don't think this means that body weight loss is more important than bike weight loss, I think it just shows that lightness is not the holy grail that some folks think it is.

-G