Its a very very passing comment and they say in the podcast it was an announcement from rockstar.
Looking back at recent rockstar stories there was an announcement of a single new IP that would be coming exclusively to the PS3 but thats it. In the podcast one of the guys speculates by saying something to the effect of "So it sounds like it must be all new games not in development yet since we already know GTA IV is going to both..".
Right now I am thinking someone read the announcement wrong, and then they added a twist to it while trying to make sense of it.
It is around 51.00. The transcript is
Woman: R* is going to be PS3 exclusive from now on so I know you guys were looking for those exclusive games so you might just get them.
Guy1: nice, do they mention any titles in their anouncemnet?
Woman: Not any specific titles, they mention GTA but they didn't mention the current one, cause we all know GTA IV is going to both.
While I would rather have more sources this podcats is pretty conclusive in what it says.