I agree with you that the quoted sentence makes no sense at all. But I don't wanna hear your snark about blue dragonhawks, you Alli! The Horde get shafted by having FOUR fewer of the easily available (and uber cheap!) racial faction mounts. I would love it if there were two separate achievements because ours required a handful less to get the gift mount. As a Horde non-pally/warlock/DK/engineer/tailor, I've got a crapton of work to do...

Ugh, I imagine that's rough :( I'm an engineer and I already have two of the three Brewfest mounts, and I got my Albino Drake without having Gnomeregan or Netherwing to Exalted, and I'm still missing many of the PvP mounts, including the two from Halaa, and lots of the Northrend achievement drakes. I'll be "sort of" going for this one along with the minipet (at 46/50 for the skunk but that's just me being lazy :P) but honestly I'll probably be farming titles for a bit longer and busting my butt over Valentine's.

"Racial restrictions" means horde or alliance only mounts such as the ones gained from PvP vendors or the city vendors. It has nothing to do with the specific races being able to ride it or not (which was removed, like you said).