Sony NEX-6 preview extended: high ISO comparisons dissapoint

Just Having Fun wrote:

There's also the problem that not all ISOs are the same. At ISO3200, according to DXO's measurements, the EM-5 ISO is effectively ISO1489. The NEX-6 ISO is also lower than it should be at ISO3200, by about 1/3 of a stop.

When I look at DxO I see for the cameras' ISO400, the OMD is really 214 and the NEX 6 is 280.

Checking their graph I don't see the 2/3EV you claim...more like maybe 1/3rd.

Also, DxO's doesn't use the same definition for ISO as most other review sites.