TPU picked up a rumor that NVIDIA's Kepler GPUs will no longer have different clock domains for the shaders and the rest of the GPU. NVIDIA's latest generations ran the shaders at 2x the clockspeed of the rest of the GPU, but this will no longer be the case with Kepler.
It is also learned that NVIDIA will have higher core speeds overall. The clock speed of the GK104, for example, is expected to be set "well above 1 GHz", yielding compute power "clearly over 2 TFLOPs" (3DCenter's words). It looks like NVIDIA too will have some significant architectural changes up its sleeve with Kepler.