Having spent the last few months talking to Partners in law & accountancy firms, it is remarkable how true Tribaut's six core traits appear to be (although he is discussing Management Consultants). See below for the list.
All the Partners we have met are highly intelligent, but more than that they have overachieved from a very young age so it is very deep in their self-image.
Also they are unabashedly competitive!
See Novak Druce Centre for Professional Service firms @ Said Business School, University of Oxford for more in the seminar series.