I found a company today that reported Net Promoter Score along with all the usual financial metrics on their Q4 Earnings call. Congratulations to the board of Polaris Industries (makers of all-terrain vehicles) - let's hope we start to see this as a regular occurence (and one where they don't need to explain the meaning of the term...)"For 2007, our quality improved significantly. Our Net Promoter Score, which is a measurement of the customers’ positive word of mouth, improved by over 10% and our two key new product introductions, the RZR and Victory Vision both had outstanding Net Promoter Scores."Source: Seeking Alpha.