Yeah, but what's the high iso performance like?
Probably the same as the 60D for raw.
from imaging resource: http://www.imaging-resource.com/PRODS/canon-70d/canon-70dA.HTM
"Sensitivity. Equally important is the Canon 70D's noise performance. Here, the extra horsepower of DIGIC 5+ should allow more sophisticated noise reduction algorithms, while the newer sensor design is said to mitigate effects of the reduced pixel pitch. Canon claims raw performance should be on par with the EOS 60D at like sensitivities, despite the slightly higher resolution. For JPEG and video shooting, the company promises a "huge improvement" in noise levels, although it doesn't state precisely what would constitute "huge".
And I can find no mention of dynamic range improvements anywhere. As an amateur that often ends up with clipped highlights while trying to minimize noise I'm willing to wait to upgrade my 60D until Canon improves the dynamic range and high iso performance.