Hey, I am a owner of a Thunderbolt and contacted the Verizon support team. When I called I was having multiple reboots a day, but then they were cut back after disabling a few 3rd party apps as they instructed me to. If you have ANY 3rd party apps that control mobile data, disable it, etc you need to disable them. Apps such as JuiceDefender and LTE On/Off can cause rebooting because they edit the code in the phone and cause the phone to reboot once a certain unknown process occurs while these apps are active. It has to do with the fact that the LTE network now uses a SIM Card, and cause issues when mobile data is being altered. After I removed and disabled apps like those, it completely stopped any problems involving rebooting for me. So give that a try for the time being until they can come up with some sort of fix to stop these issues while 3rd party apps are active.
There may be some truth to what you are saying. I noticed once I flashed my rom and for a few days before I would restore any of my apps, I would not experience any of these reboots. For the longest time I had a feeling that they may be caused by an app or apps that are not playing nice with the rom. Just did a clean install of Liquid Gingersense 1.1 and did not re-install any Market Apps. Gonna run that way for a week or so and see what happens (just to prove a point). I believe I will not experience any reboots during this time.