New at Casting Out Nines: Khan Academy redux

So, after not really thinking about the absurdly bitter debates about Khan Academy (see #mtt2k) since the summer, I found myself caught up in two independent threads about KA this week. The second was a surprise -- I am specifically called out in a whitepaper by the Pacific Research Institute, a free-market think tank in California, as a Khan Academy critic. Keith Devlin and Derek Muller are also on this list, and there's an attempt to rebuff or discredit -- I'm not sure which -- our criticisms. This post is a response to that paper. 

We can make this into a drinking game if you like -- take a shot every time someone says in the comments that I'm jealous of KA's success, or a liberal (ha!) trying to protect  my job, etc. 
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