1. I looked at the Revenge of the Sith Crawl first. As expected, the star-field does not move.
2. Then I studied the 1977 crawl. The star-field is moving - this is the first indication that it is the "real thing". If they used the same process for recreating the crawl as the prequels then the star-field should not move at all (they just take 1 frame, and put the star-field over it, they don't composite it over a movie of the opening crawl).
3. Comparing the quality to that of ESB, it has clearly been mastered after 1993.
OK, now I remember when I suggested that the 2004 crawls were recreated - and I didn't say that they were beyond doubt, but I thought they were - and people said "no, Boris, they're the originals"... so let's compare, if we shall, to the ANH crawl... the crawl is exceptionally stable, and the stars don't move. This would suggest they recomposed a digitally-stabilized crawl onto a stationary star-field.
Maybe it's just me, but the 77 crawl doesn't resemble either the generated ROTS crawl - or the digitally stabilized ANH one.
So, let's have a look at the EOD... the text does move more then on the "GOUT" disc... however the stars seem to move less.
It's my opinion that this crawl has been somewhat stabilized. It does not appear to be a recreation, and the 77 crawl does subtly "wobble" on the "GOUT" disc ever so slightly about once every 2-4 seconds.