This may be a mfg problem, but you gotta admit Apple's support is amazing. When I was angry after my first ipad2 I emailed tim cook and steve jobs with my complaints and the picture from the CNET article, and within hours I was called by someone from Apple and they arranged an exchange at the local apple store. Now I had already called the store prior to hearing from this guy, and they said they were out of stock. I guess they lied because after the guy from Apple called the store manager they had an exchange for me waiting to come pick it up...I can't say I've ever heard of another company being this great at support. The problem is that the second unit has the same problem as the first -- and I can only assume that there are thousands, if not tens or hundreds of thousands of affected units. The thing we all want to know is -- what is it exactly? What is causing these "artifacts" to appear on the screen? MFG defect that's permanent? Or is it the glue \ evaporation thing that will eventually go away? I'm going to update the guy from Apple executive and let him know that the 2nd one is bad as well...I am sure they will look into it and release some kind of statement. It's not like them to deny stuff or "admit nothing" -- like the dude said, remember antenna gate? They had a whole press conference for it, and that wasn't really a show stopping issue imho.
Getting back on topic tho -- I think the only thing we can do is wait. Unfortunately the apple store here doesn't have rest rooms so I could not tell if it was bad or not when I opened it in the store. They really need to look into this and release a statement -- because a lot of people are either really mad or panicing right now.
My first gen ipad had and still has absolutely no problems whatsoever.