I know Sony has been trying to go after the portable market with the PSP, but I think of this holiday season where having the PSP around has held back the PS3 more than it should.  Because of the need to promote the PSP, Sony had first released Gran Turismo on it (full version), and has delayed the PS3 version.  I believe Sony would benefit greatly if they had Gran Turismo out for the PS3 this holiday season, but I believe the PSP has resulted in a delay.

Anyone else have any thoughts on this?

No. alot of games that is going on PSP are not made by their main devs. so its not effecting them.

on gt's
they give you a reason to buy a PSP with GT PSP in hype of GT5.
its a clever move. and thats why they delayed it, well actually they never delayed anything they didn't announce a release date.