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I have the same problem with audio sync. I spoke to a Verizon tech support person yesterday on the phone and he was unaware of any problem, or a future fix. Perhaps you should spread the word to the tech support people.
This is a major issue with HDMI cables on the VZ 1100 server/box. Fix is to press the hold button on the remote control then the play button which is immediately above it. This corrects the delay on the sound. There is also a second temporary fix for starting the picture. This involves pressing and holding the “lit” power button on the 1100 server/box for 15 seconds. VZ says this all started with s software update in late October connected with Netflix. They expect to correct both with their next software update sometime in January. They do not know when. I was told this is a huge issue affecting customers in many eastern states. Impression I have is this could invoke tens of thousands of customers. For the information I noted above I made at least ten phone calls along with a new 1100 box, router, HDMI cable and battery. None of this corrected the problems. I also had a technician visit along with BestBuy’s Geek Squad. Verizon needs to tontact it’s subscribers and explain what is going on.