According to some very credible sources, a new GTX 560 Ti will be launched at the end of November. This product will basically be a GTX 570 with 448 CUDA cores instead of 480. This gives the new GTX 560 Ti more bandwidth, FLOPS and pixel fill rate than the current GTX 560 Ti. The new Ti will have a slow texture fill rate than the current Ti due to the fact that it has fewer texture units (just like the GTX 570).
Here's a nifty table from SweClockers for y'all to peruse: