Yes, they're going to be 3.0. Every 7000 series card (7730 and up) also uses 3.0. AMD's website is (surprisingly) not the best place to find info on AMD card specs - see this thread - they're filled to the brim with typos and weirdness. I've always liked Wikipedia's big "Comparison of Graphics Processors" list for AMD and Nvidia.
Also, 7970 @ PCIe x16 3.0 (not my screenshot, but you get the idea):
(might have to click the question mark and start the render test to get it to run at 3.0)