He was the "dominant" Source AWP for a brief period of time when the quality of teams was extremely low. Plenty of players were better than him.
In NA alone: devour, DaZeD, AZK, adreN, and fRoD were all objectively better. Hell, Nightfall was too, for the brief times he was around. You could probably argue for frozt, n0it, brawwr and ridic too.
The thing is, mOE was 100% reaction time with 0 sense. He was very fast in his prime, but his accuracy was pretty bad.