all I found of the film print was that reduction from a scan that was 1123 pixels wide. So I downconverted the HD-DVD, too as otherwise it would not make much sense to compare the two. Yes, the jacket has more detail in the full size screen grab that I could not post due to size limits on imageshack, but it still looks completely different from the jacket on the scan, which was the first thing I noticed when I saw the two side by side. I have made a few tests myself with Grand Prix and as good as it looks there is very little detail that goes beyond a 1280 x 720 resolution, so for most other purposes than the jacket not very much is missing by downconverting to 1123 x 632
Regarding the grain reduction: I would think that Warner might have worked with Lowry for that title and according to Robert A Harris they have the best grain reduction algorythms in the business. But I think one of the reasons this is not quite up to the best of the best is that there is so little grain - it looks a bit strange. It could also have been that the transfer was filtered a little to go below a certain bit rate and therefore most of the grain, being very fine, disappeared, too.
As for Patton the guy who had worked on it in another function said that they have an inhouse "wiz" that does DNR and grain reduction at their facility and I can only say that he probably does not really know when to stop