That could be source for that information. I don't know, though. As far as I know, most of the popular LD rips are NTSC. I hope the author has validated this info, cause it does sound a little odd.
What do you mean by the original Stormtrooper lines, Darth Lars? I haven't watched the originals yet, but are you referring to the added "There's no one here" off the 2004 DVD, or to the "Close the blast doors" from the 1977 mono mix (if I remember correctly)?