Agreed: it's gone bright yellow. And I can see what you mean, quantum, when you say 2.3.3 looks red/purple in that vid, but somehow it doen't quite work out like that in the flesh. What IS noticable is the washed out feel of the new one. I think the side-by-side shots of the nexus live (first shot) get it across better than other ones. And I do actually think that the whites (like on the google bar or just in the messages pages) look like they have a yellowish tinge.
In the most basic terms, the screen doesn't look rubbish, just "normal". Before, it was a stand-out "wow" feature of the phone (which is what all the reviews used to rave about - don't know if they can do that now).