I have a buddy who has a rans dual 700cc bike and he climbs like a fiend, but he trains for hills like a fiend, too! I climb pretty well on any bike, but the p-38 is my hilly bent of choice. Heck, I could climb well on my baron lowracer as well. Bachetta Aeros are also great climbers.
I think it's really about the person and whether they train for hills, though.