True enough, but Bernanke did invert the yield curve like all central bankers do, but shouldn't. Bernanke said it was irrelevant. He was wrong. Bernanke also said subprime was contained, and he was wrong about that, too. As far as being behind the curve, that's a common trait of all central bankers.
Greenspan is an attention whore. He should shut his mouth and retire with grace.