I must say I haven't monitored it for a long time yet, so I haven't seen significant differences yet (also because currently we are blessed with multiple high XP players, so it's difficult to compare it with less XP players). I did see a 2 high XP guards taking a lot of offensive rebounds (one was playing at C in a reverse patient, but even still):
(55212), but in another match when we played that tactic with those guards they only grabbed 1 combined. Also, I haven't seen how a less XP player would perform in that role.