Yeah, GTX 400+ series
I've seen the benchmark test and so far in general the HD 5970 is still better. Although the GTX 480 is a single GPU card and the 5970 is dual, so when they dual the 480, if ever, it'll be way better than the 5970.
Obviously everything is new
Memory interface isn't 512 bit anymore though. And there are overheating issues sometimes known to happen with the GTX 480, and it is said that the fan is audible during its "load".
Good article I found for the GTX 480 (Not 475) is http://benchmarkreviews.com/index.php?option=com_content&task=view&id=480&Itemid=72