I agree and think Hammonds on screen vagueness is all part of his schoolboy Top Gear TV persona. He wasn't like that in his earlier presenting days. I think Clarkson and May don't have to try too hard and their TV personas are true to life.
I find Hammond almost unwatchable and after watching the interview I don't know if his Plus Six was crashed, crushed, drowned or any combination of the three. And no mention of replacing it with a new Plus Six either.