Pinkman, the WSJ article links to the same photo of the 'window panel' that we have already seen, could be any piece of unrelated floating debris (eg. some large piece of Styrofoam packaging). Until it is retrieved and confirmed as an aircraft part, it's no new information.
Agreed. It actually looks to me more like the inside of a porta-pottie missing the lid. If you've ever had to search or retrieve anything from sea you will know that it's hard to identify something like that from 200 feet much less several thousand... it has to be physically retrieved. I don't mind seeing leaps in conclusions from arm chair posters, but to that from professional reporting outfits like WSJ is kinda bothersome.