Thanks for reminding me, I wanted to read that interview last week
The reason I´m a little bit suspicious about this are discussions like this:
I think it just depends on each album and whether there are Master tapes available. I try to get as much information about a release before buying it though
But Digby didn't lie there at ALL. He said they were from the Redbook masters.
All the FDR releases to my knowledge are straight from the original studio recordings (analog or digital, whatever the band or studio used).
You really can't go wrong with the FDR releases.
We also posted an interview with Noel Summerville (check out the other Metal-Fi article about it) who is doing the masters.