Yeah, sounds like this guy has the "they are out to get me" mentality. You can release your IP from the Verizon router easily.
Also, do you expect them to support a third party router? No ISP does that. Even cable companies will ask you to remove the router and go directly to the modem to troubleshoot. Does this really justify a connection reliability of 25%? Very, very few people have unreliable Fios connections.