I felt Carlos won convincingly. But many others didn't. Couple that with the fact that the former SF WW Champion vs. the current UFC WW Champion was always a must-see fight, and I'm happy.
Carlos being the last WEC WW Champion was largely why I wanted to see him fight GSP for years. And the same philosophy applies to Diaz. Where are Hendricks' gold medals?!
(No one will get the reference... elitist MMA fans)