I suspect there's just a wee bit of hypocracy taking place here.
One has to wonder if this truly was the case, and he came to these conclusions in a reasonable timeframe (on the order of 1 year), why on earth he's bothered to stay with HP for 2 full years?
Very likely this was due to an "earn out" clause in the acquisition agreement of Tabblo (his start-up).
So, in other words, the author has stayed-on for...the paycheck.