Eddy Merckx, for the quote above.
I agree that in a flat race weight is not much of a concern, but in the hills it can make a big difference. I have lost 15lbs in the last couple months, and I certainly have noticed that climbing has become increasingly easier. Part of this, of course, has to do with climbing more. But I had a dramatic 5lbs loss in week and certainly have noticed a huge difference after that. I feel lighter when going up hill.