Did you know Ullrich used to have a TT machine that was only labeled Giant....
I don't think it is really that uncommon a practice. There was a bike up on ebay a while ago that belonged had once belonged to a top female usa racer. It had LeMond stickers pasted over the orignal brand (the current owner had started to peel them off....)
"Sharing the road means getting along, not getting ahead" - 1994 Washington State Driver's Guide