I just found this article comparing the Canon 650D, 600D, Nikon D5100 and Sony Alpha 37:http://www.techradar.com/reviews/cameras-and-camcorders/cameras/digital-slrs-hybrids/canon-650d-1083870/review?artc_pg=5
If you look at the lower graph, the dynamic range of the 650D looks a lot like the Nikon counterpart with only a gap of 1EV. However i'd wait for independent confirmation of the results and for techradar to recheck their data because the labelling for the 600D is wrong (pink curve is also labelled 650D) and it seems that the 600D has the JPEG curve in the TIFF result. So we wait for the techradar people to sober up and redo the graphs.
On DxOMark the 600D scored 11EV and the Nikon D5100 scored 13EV at ISO100 screen resolution. If the 12EV figure is true that would be a modest step forward.