For me, it's impossible to play Rage with my desktop PC (E8500 @3,16GHz, HD6850 1Go, 4*1Go DDR2, Win 7 64 bits, 23" 1680*1050), whereas the BF3 beta worked very well (as Crysis 1, 1.5 & 2, Deus Ex Human Revolution...). Sometimes the game starts very well, but I have some (a lots in fact) micro-freezes (like playing with 1 img/sec), other days it's impossible to launch : the program is not responding (I don't know if this word is correct, sorry but english is not my native language). And the CPU is always working at 100%.
My notebook runs RAGE with no problems (ASUS, i5-2410M, GT540M, 4Go DDR3, Win 7 64 bits, 14" 1366*768) , but I don't want to play on it (the screen is too small for me and RAGE is a bit "ugly").
With these two PC, there's also a problem on textures, which are very long to appear. But I think I'm a lucky guy, because I've never seen any artifacts.
I want to add that I pre-ordered the game (retail box). I really hope it'll be possible to play to RAGE very soon, the game seems to be very fun, very immersive. Please, keep working on it

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[edit : Catalyst 11.10 with RAGE Special Patch on desktop, nVidia 280.26 on notebook, both Win 7 are up to date]