That quote doesn't do much for me.
Without context it's impossible to know, but just reading the language of the quote it seems like the predictable thing to say. He doesn't seem ecstatic about it, and he's not saying it's a deal breaker for USC.
IMO he visited ND to early and has always been USC to lose. I think he would have committed a long time ago if Kiffin wasn't the coach. It's been on record that he didn't wanna play for Kiffin.