It seems like my skepticism was mostly well founded.
The overall impression seems to be that Rage is a great looking game and a competent shooter.
However it is also rather shallow and the open world vibe that ID has been trying to push is pretty much only skin deep.
|Rage: You shoot people and it's not terrible|
I will try to get my hands on a rented copy of the game and check it out for myself.
Although, as I am not a very big FPS fan I don't expect I will be all too entertained.
In the mean time I've rounded up some of the reviews out there for your perusal:
Joystiq Rage review (3/5 stars)
Gamespot Rage review (8/10)
IGN Rage review (8.5/10)
Also there is a one hour long Quick Look up at Giant Bomb here