The problem is when you take a pic of someone's skin from a camera phone that has more grain than normal.. look at it on an RGB Stripe display and it looks "decent".. albiet with the grain..
look at it on an Pentile display and you see unnatural colors added into the mix. I'll try and get an example and post it. (I have a Droid1, DroidX, Droid3 and Atrix so I'm very familiar with the differences)
I would be very interested in seeing what you are talking about as everything I have read and seen points to pentile being almost indistinguishable from other techs on pics/video.