Well Bobcat eventually hit 1.75GHz with the E2-2000 (with a modest graphics increase included, but much higher graphics turbo) that's up almost 10% on release clocks of 1.6GHz. I don't think it's a huge stretch to get Jaguar to 2.15-2.2GHz, granted it would be in a much shorter time-frame assuming these higher parts release soonish.
