Given that IDEO is still seen as the pinnacle of design consultancy shops, and most other successful design consultancy shops have similar processes... that see

Given that IDEO is still seen as the pinnacle of design consultancy shops, and most other successful design consultancy shops have similar processes... that seems like a pretty good evidence (yes, I know that is not a particularly rigorous experiment). I'd love to hear from someone who's been at IDEO or frog or wherever chime in with any experiments they've done in alternative practices.