TServo2049 said:

I will warn you, I was looking at You_Too's Blu-ray screenshots, and I did notice something unsettling. The screenshot of Vader's first entrance looks to have that waxy, Photoshop-watercolor-filter look of an image that has been too heavily degrained.

You're right. I didn't think about that before you mentioned it but they sure have used noise reduction of some kind there. It might exist in the HDTV source too though, but the broadcast-compression plus the fact that Harmy's source was a downscaled one is maybe the reason it can't be seen there.