FatherMadman: I feel your pain. I just received a followup call from Verizon (my first after six months of troubleshooting) and they offered to send yet another tech. I refused, and impressed upon the CS person that there's nothing physically wrong with any of the components in my house. Instead, I told her that I suspect it's a software issue and can only be fixed with new firmware. Remains to be seen whether any of this sunk in, but I have my doubts.
Of course, my issue might be different from yours, but one thing is consistent -- failure to detect the root of the problem by Verizon CS.