Here`s pretty recent (friday 23rd September) Tim Willits interview by GeForceUK moderator. I found this on nvidia.com as I`m buying new card for Rage and I`m going for geforce GTX 550 or spend a little more and get 560.
Btw. Tim mentions that average playing time on Rage would be 15 hours and if you do all side missions and just do it "properly", then 20 hours. That`s non-stop of course, I estimate to play that for few months on and off :)) Plus maybe multiplayer if it`s fun.
Btw. I fixed the Rage Character Animation post, now video is embedded