As someone prefers D&D (even *shudders* 4e) over GURPS, I disagree rather severely, especially since GURPS is one of the most horrible point-buys I've ever seen.
Both point-buy and class based systems have innate faults and benefits. Neither is innately better than the other. The only possible reason I can see behind the arguement of class based being boring would be just that people have made a lot of heartbreakers without trying to actually have any originality rather than a fault in the concept of a class based system.