I do think he is the best as well, but, he games it up. First, he changes his mocks significantly before the actual draft so nobody copies him. Second, his "picks" are made at the draft itself with the benefit of knowing which players are still unpicked and who has traded for the pick. Third, they often announce the pick before the ESPN crew does because they either see the written card or hear the representatives discussing it. Four, he watches who is on the phone when the team phones the player, sometimes that gives it away, particularly on the first day.
So, while I wouldn't be all that set on his pre-draft day pick for us, I do think it's worth noting the position and the players he has listed being picked before us at that position.