The 70D is at 13 stops. There isn't room for "significantly better" DR with a 14-bit ADC.
Except that the 7D has 11 stops of DR, not 13 stops.
Except that I was talking about the 70D. It's a good guess that The 7D markII sensor will be at least as good as the most recent APS-C sensor from Canon.
The D7100 and the Exmor sensors have 13 stops of DR.
13.3 to be precise.
Canon is still stuck at 11,
EOS M 12.4 Total RAW
70D 13 Total RAW
Myths die hard, don't they.