If this is accurate, I don't know why there would be a need for much "final testing" if the 70D is to have the same sensor as the 60D.
I'm also not sure why everyone assumes that the 70D and 7D II will share the same sensor if the 70D gets a sensor upgrade. Canon has three sensors in three full-frame bodies. It's very possible we could see a new 22-24 mp sensor in the 70D and then an 19-22 mp sensor in the 7D II.
The rumor didn't say the same sensor, just Olog-hai there preemptively complaining.