Yeah, with the T4i, the availability was pretty fast, but, with the EOS-M system, they've waited a few months. A new 70D would probably release faster, but, chances are it'll be very similar to the current 7D. And a new 7d mkII is pretty unlikely to be announced. And if they announce a new full-frame, I'd bet they would want it out in time for holiday sales, but, who knows.
They've generally been better with bodies than with lenses