For Perk, I don't think it matters that much. However, as others have said about Shaq, I think he'll be more effective starting. When he's with the starters and can't be doubled, he's unstoppable.
However, I don't see him being effective at his age if he's the focal point of the offense.
Another thought, does Perk really think that way, or has Doc simply told him he's coming off the bench already?
Quite frankly, I don't care. I want whatever is best for the team. And if Hondo and McHale can come off the bench, it's not too much to ask Perkins to. And as I said in another thread, it's not like we're asking him to come off the bench behind Brian Scalabrine; we're asking him to backup arguably a top 10 player of all time.