The first day I took my new GT Aggressor into work, leaned it up against a fence, put the handlebars between two of the fence bars and scratched a line about 2 inches in it.
A few weeks later, it fell over in the bike racks (I knew there was a reason for not using them) big chip in the downtube.
My Road bike has a few paint wear marks where cables rub and where my trainers used to rub on the pedal cranks, but thats about it.