I got myself into a debate about Net Promotor Score over on the Attentio blog. After I had read a post from Simon I added my pragmatic take on the matter and rather quickly Tim Keiningham responded back. So I did away with my good intentions to make this a no-laptop-day (a bit of iPhone at the most) and continued the debate.
Ideally Mr. Reichheld would mingle in the debate ... let's see whether he follows the blogosphere. I think he owes this to his public, especially as I'm a member of the "I am a Fred Reichheld Groupie" group in Facebook :)
Go have a look and throw in your idea (here on on Simon's blog).