Yep. He had The Unicorn pegged as Tori Spelling pretty quickly.
Ken's whole deal is that he's just playing the fool. He's not even trying to guess the right answer, except once per season when he knows for a fact who it is and wants to throw everybody off who assumes he's gonna guess it wrong. And sure, I can see why a lot of people think his act is wearing thin, but it's actually kinda growing on me.