Andrew,
Thanks for the test. Did you ever get to test a D5100? I know the 5200 has the new sensor from Toshiba, but other than that they seem like pretty much the same camera (plus and minus some autofocus points). I'd be curious to see if the D5100 was delivering similar quality and no one bothered to test it because of all the hurdles Nikon puts on their cameras to get clean video out of it.