I thought Xanadu deserved it more than any other show. I thought overall, it was the strongest. Passing Strange has its' flaws, and is clearly not for everyone (as much as I loved it), In the Heights has a very weak book, but Xanadu, IMO, has a catchy, hummable score, a tight and witty book, and a great cast giving great performances. Also, it got the best reviews of the four nominees. It's more than excessive camp and Cheyenne in shorts (Especially to me, since I preferred James Carpinello), and I was really hoping it'd take the big prize.
"Get mad, then get over it." - Colin Powell