Its been bugging me for a few months now with the constant lag I get with Youtube on all my devices and chatted with VZ today about it. They did aknowledge there is a problem, here is their answer:
"I've just checked the issue with my Network team, we are receiving such issues with you tube since quite some time, network team has ruled out an compatibility issue of You tube servers with Verizon routers, the new 3 rd generation router we are offering now works perfectly with you tube so we are working on to update the old routers to work with you tube properly, we will update the firmware on these routers to fix the issue. The new firmware for the router will be released shortly and it will be updated automatically, you will be notified by an email."
Here is hoping for that firmware!