Yeah, I had major issues with this with the 2. My first one suddenly developed a bunch of dust under the screen in the top right corner about 2 weeks after having it. Took it in for an exchange and they gave me one that looked perfect at first, but had what looked like a water stain on the glass on the underside. I decided to keep it, but then it got 3 dead pixels, so I exchanged. The third one I got had a HUGE chunk of white dust under the screen right in the middle. Even my wife noticed it, and she's really not nitpicky about gadgets at all. I took that one in and the genius told me that I must use it in a dusty environment, basically blaming all the issues on me. I told him that I sit at a desk behind a computer all day. He offered me one last exchange and advised that this was the last one. Alas, more dust AND a scratch in the bezel area. I inspected it in front of him at the store, but the light must not have been right to see the scratches, and I don't know why I didn't notice the dust.
In the end, I put a screen protector on it so I couldn't see the scratches and just learned to ignore the dust. And when I unboxed my new iPad today, I made really sure to NOT inspect it.