His speed is no worse than average for a sweeper. He didn't lose ONE footrace all year. What makes him so great is not just the fact that he's got great field-vision, but that he's ALWAYS in the right place at the right time. When the other team gets a corner or a deep throw-in, it's pretty much already known that John's gonna win the ball. If you saw the game against NW in last year's playoffs, you'd probably have an easier time understanding. He's pretty much a second goalie, only he's not allowed use of his hands.
His gayness is his only weakness, but we're still working on that.