As a test, try changing the DNS on one device (PC or iPhone) to one of Google's or OpenDNS' addresses:
8.8.4.4 8.8.8.8 ....
The DNS changes didn't make a difference but thank you for suggesting for me to rule this out. As I understand it DNS is just there to resolve a FQDN to an IP address. Once the TCP/IP connection is made between the Netflix content server and my device DNS ceases to be a player. Incidentally, I did some NSLOOKUPS using the Verizon DNS server and the response was virtually instantaneous even with some really obscure domain names.