So if Oberto tips a rebound to an opposing player, you think Oberto gets credit for the rebound?
I watched the stats closely last year and Oberto was almost always given the rebound if he tipped it to a teammate. I'd say like 95-98% of the time Oberto would get credit as long as a teammate secured the ball. Sometimes though, the scorers wouldn't give it to him ... in which their thinking has to be it wasn't a "controlled" tip.
But in recent years, the definition of controlled tip has expanded pretty generously. For example, those times Oberto just batted the ball blindly to half court, he'd almost always get credit.