The Fallout 4 comments are silly on his part, but in this case, surely you can see where this comment comes from. I mean, Skyrim *WAS* fine on PS3 until you've played for a very lengthy period of time after which things start to get progressively worse until it's unplayable. Right out of the gate, it's not bad, and it stays fine for a long long time.
The problem is exactly the same as Morrowind on the original Xbox. The game never ran great but it was playable initially. The more hours you put in, though, the worse it gets. After you've played for a long time the game becomes almost unplayable with single digit frame-rates and load times that literally last upwards of 5-6 minutes.
They have a real history of this stuff.
I do think he's being disingenuous here, though, as Fallout issues crop up very quickly.