Legal warning in under 6 hours after launch
blog.skierkowski.com
blog.skierkowski.com
In regards to turnaround time, more interesting than the "how?" question is the "who?" question.
> Net Promoter, Net Promoter Score, and NPS are trademarks of Satmetrix Systems, Inc., Bain & Company, Inc., and Fred Reichheld.
The "Bain & Company, Inc." implies political motivations in closely watching and protecting the assets of Mit Romney during his campaign. Even if Romney is no longer involved with Bain, the current executives at Bain are most likely on high alert.
The takeaway in this case is that aggressive enforcement helps protect a mark holder from losing their claim to the trademark. It seems like you just need to TM those NPS phrases and add some legal notice in your global footer to be in compliance.