I have a 7-0 big with 90 ATH
he has won 6 of 18 opening jump balls on the season.
losing to guys: 6-7 57 ath, 6-9 37 ath, 6-10 46 ath.
real small sample size, but it appears to not be always the bigger, more athletic guy that wins the tip.
A few years back I read that the NFL team that wins the coin toss in overtime, wins 52% of the time.
While the NBA team that won the opening tip over the course of the year won 55% of the games.