And again, a longer post than I intended..
story of my life.
I think this is fairly logical with look inside offence. People will skimp on the guards, particularly SG and jump range, simply because of the number of 3's that these guys taken when using LI.
So the same logic applies with other offenses. I think this is where Driving is most critical offensive tool no matter the offense. Driving really supplements a forwards IS and a forward with high driving but 'average' IS by comparison will still score quite reasonably.
With specific regard to Princeton? Yer id probably sacrifice IS on a C. I think a high passing C would help the offensive flow.