I have been following Scott's site for several years. He is at the top of his field, one of the most qualified quantum computing theorists. Sometimes his sarcasm is juvenile and falls flat, but this post is classic. Yes you would have had to been following along to appreciate it. And it would help to know D-wave at one point actively recruited Scott.If you want to know whether or not quantum computation is taking place, this is your man.
I highly recommend reading further on his site, including his papers and lecture notes. I especially recommend his lecture notes "Great Ideas in Theoretical Computer Science" http://stellar.mit.edu/S/course/6/sp08/6.080/materials.html and "Quantum Computing Since Democritus" http://www.scottaaronson.com/democritus/
Enjoy.