My not-buying is still not exclusively because of DRM right now but I would also still rather have my savegames on my own computer. Also, I tend to turn the internet connection off when I'm not using it, so DRM meddles with my good habits
On the other hand, amazon reviews (especially for video games) are known for not being about the game itself. Often people will already post when the game is not even released, just to tell how excited they are.