Hopefully there are not too many issues. I am optimistic that the lengthy delay means Moto & VZW are doing a thorough test run. I don't know if you can block it without being rooted (not sure if you are or not). I think you can clear the OS Upgrade notification for a few weeks (maybe less??) until it automatically downloads & installs. Hopefully some Razr M owners will download it right away and post there results / opinions, etc.