Your prooflink is not entirely correct.
Sets like Cadaverious and Deathbone were available since the beginning of the game
Here
http://wow.allakhazam.com/forum.html?forum=21&mid=1105032975272612450#12 is a forum message mentioning those, dated Jan 06 2005 which is really early vanilla, way before 1.10.0
In 1.10, however, those sets have received a major buff, it appears.
http://www.wowwiki.com/Patch_1.10.0 mentions an item upgrade for Scholomance loot among other things, and
http://wow.allakhazam.com/forum.html?forum=21&mid=1141845763102202071#1 dated Mar 08 2006, merely 20 days before 1.10 release, mentions the upgrades that those items receive. So I'd guess its a matter of stat changing, which has been numerously mentioned as pretty much impossible, since it's incredibly hard to find all the stats the items had before buff patches, and would also bring about the need for changing of raids, character talents, mechanics... Forget it. It would be awesome, yeah, but forget it. Not happening.