My GTX in e1705 is working just fine. 110 FPS in CSS stress test with everything up on OC. The thread i bet your talking about was started by me. The problem turned out to be the CPU not staying throttled for some reason. I cant say if that issue is associated with the GTX or not.
All in all, if you want to game, buy a desktop. Not that i regret buying the laptop and putting the GTX in, cause its definitely sweet, but for the same amount i spent i could have had a Conroe with a 7900 GTX, and SLI capability for when i needed it down the road, and also upgradibility to DX10 cards.