I doubt he has anecdotal evidence or he'd have mentioned specific cases in his article. It's a theory he's working on as part of his efforts to convince the best and the brightest to work for his company, a high risk unstable start up, for below market rates. There's one of these articles out from some guy at a VC backed firm who is unable to afford competent people every few weeks. The best idea these guys ever have is to write articles telling all the "coders" that they are not as special as they think they are and would be lucky to work for a fine firm such as theirs in return for vague promises of magic beans.

Meanwhile I have no problem at all hiring the best and the brightest. It's super easy to find good people and hire them and how to do so is not a secret at all.