I haven't been following this thread so I don't know what the GAF consensus is, but I'm just not feeling this game. I'm fine with just running around, shooting guys and collecting loot, but the overall experience here feels unrefined and sloppy.
Character animation in general is weak (what's with the distractingly jerky weapon sway when sprinting?) and I find the sound design to be extremely lacking. Voices sound like placeholder, and in many cases it feels like sound effects are just plain absent. This game is all about shooting, yet there's no sound for bullets impacting bodies. Limbs get blown off, and bodies impact surfaces with considerable force and again - no corresponding sounds. Vehicles cruise along with no sense of wheels churning on gravel and dirt, and landing hard after a big jump is also silent aside from engine sounds.
I know that all of the above could be considered nitpicky, but small things like this add up. Little details and a consistent level of quality across the board are what makes games like Uncharted 2 and Batman: Arkham Asylum the top-tier games they are. I don't think Borderlands is terrible and I'm having a decent time with it I suppose, but there's a lot here that's lacking and I don't feel that the shortcomings have been reflected in the reviews.