It`s below the league average bro.
Gay takes 16.4 shots to score 17.2 points. That isn`t good.
Bargs takes 15.2 shots to score 16 points.
DeRozan takes 14.9 shots to score 17.4 points.
So yeah, DeRozan is the best of the bunch, mainly due to the fact he draws more fouls by cutting in more than the other two who settle for bad jumpers, but still it`s nothing impressive.