@baldur The same can be said of most people I've met over the years.
How many working programmers have read Knuth or SICP?
How many PMs have read Brooks or Fowler?
Instead of management Goop picked up at airport kiosks, these tech ppl get their info from the slashdot's, Stack Overflows, and Hackers Newses on the Web.
I daresay this applies to any human activity.