Why not? The inside front isn't doing anything on a 911 on power anyways. I want as much as possible on that inside rear, a little occasional front lift isn't a bad thing. Just means you've reached the limit.
I'll agree that a car that mooshots the inside front like a trophy truck is indicative of an issue.
Do these things have any rear roll stiffness at all?
The long and the short of it - if the car works, it feels good, it's balanced, and it's fast, I wouldn't worry too much if you're carrying a tire or not.