Skillscore > Gearscore?

Well, turns out it's possible to pull 5k DPS in the Pit of Saron wearing nothing but greens and blues with a combined Gearscore of ~4,700:


Note I had no enchantments and very few gems ... I strapped on some random greens I rolled on when running heroics, although I did have the 245 T9 twopiece.

More interesting, when I re-ran the same instance in my full Sanctified 264 raid gear, proper talents, gems, and chants, my Recount said 6k. My fail or a scaling issue?