Yes, he was robbed. Fight should've been a draw at most, Bisping won rounds 1&2. Landed more shots, controlled Chael against the cage, stuffed a lot of takedowns and sprawled up almost immediately when he was taken down. In round 3 Sonnen had full mount but couldn't do shit to him. Olympic level wrestler, pfft. And then Bisping ended up taking him down in the end.
He did not land more shots in round one. Look at the stats! Is that what you saw? I'm not taking anything away from Bisping, he's fantastic!
Oh, and I might agree on a draw for that fight. But draw and robbed are two different things! Which is it then?