OTA (Over The Air) Update pushed to my device sometime last night (Pacific NW Region).
It's still 4.1.2, according to my device ... :-(
Here's a few references related to the update for your review.
DROID RAZR M Receiving Update to 98.16.3 and 98.18.78 ? Same Deal as the RAZR HD Update ? Droid Life
Software Update: DROID RAZR M by Motorola | Verizon Wireless