Before I start this post, I should warn you that every single post we do about the size of something ingame must, by contractual obligations, contain a risqué double entendre somewhere within. Be warned.
Reader Veras was nice enough to point out to us that as of the 2.4.2 release, Tauren two-hand weapons have returned to normal size as planned. It seems to me that this got fixed fairly quicker than other size issues that Blizzard has had. We still have no idea how their code works (and what they're changing that causes all of these weird issues), but at least they're getting better at fixing things.
Of course, as any Tauren Fury Warrior will tell you, it's not the size of your two-hand weapon -- it's how you use it. Contract fulfilled.