I haven't watched the whole movie yet but I was able to tell immediately that the scene where Tank is shot in the back by Cypher was a DVD upscale. So yes, I believe at least some of the upscaled scenes are noticeable. But this is watching on a PC monitor where I'm very close to the screen. On an HDTV and from a normal watching distance it may not be as apparent.
The HDTV capture does have the DVD colours. Only the BD had them altered.