Perhaps even more impressive the S3 set made the Video Business Magazine (a publication of the Variety group) aggregate Top 20 DVD best sellers for the first two weeks it was out. Since this list is derived from the top seller lists from over a dozen top U.S. retailers this is quite a feat. (Even more so given that widescreen and P&S editions of the same film are reported separately - so a LotR: Two Towers can occupy two of the twenty slots itself - and did.)
The S1 set didn't make the list at all; the S2 set was on for one week if I recall. Each new set is selling more than the last among new releases, and folks are no doubt still buying the older sets. Gee I love a happy ending.
Indeed they are. Last quarter I saw about half as many sales for the previous season set as their was sales for the current season's release. Also, every quarter there is a handful of sales for the movies on DVD too. This quarter, someone even bought the three pack of season one, two and three which was a first for me!