yes that is true, to get a better indication of how he is performing comparably, would be to have a look at his ratio of rebounds that he is getting for the team.
If my team is getting 100 rebounds a game, then 7 from the PG is probably not that much. 35 rebounds a game, and he is doing really well.
And as much as i love my statistical analysis, im not reeeeeeeally that interested in analysing this one LOL