Thankfully not happening with my iPad. I was worried when I had problems with it at a hotel, but it looks like it was just a problem with the hotel. Bad news for Apple, though.
I've seen some weirdness with my signal meter today, but haven't seen network performance be too bad. Maybe just a problem with the meter data/display thereof?
take a look at step 19 on the ifixit ipad teardown... <a href="http://www.ifixit.com/Teardown/iPad-Teardown/2183/3" rel="nofollow">http://www.ifixit.com/Teardown/iPad-Teardown/2183/3</a>. notice the soldering. probably a manufacturing problem on certain lots.