Connect times are dreadful, related to DNS

I had FiOS installed on Tuesday 11-Feb-2014. I got it, but I don't get it. 15/5 tier, Actiontec M1424WR-Gen3I, 40.21.10.2 firmware. I'm running Vista and my browser is Firefox 27.0.1. I experienced the problem with a wired connection yesterday, before  I pinpointed DNS. I  have not tried wired since.

speedtest shows consistent 15.xx/5.xx, as promised and expected. It's connecting to speedtest.net (or any website for that matter) that is the problem. I gathered data using Network Monitor in firefox that led me to the conclusion that the problem is DNS. I am using OpenDNS on my computer.

I've been trying to track this down for 2 days, and here's the latest:

Here are the results of  "ipconfig /all" at 5ish pm after a restart. Connections times were all good.

Wireless LAN adapter Wireless Network Connection:

   Connection-specific DNS Suffix  . : home
   Description . . . . . . . . . . . : Intel(R) Wireless WiFi Link 5100
   Physical Address. . . . . . . . . : 00-21-6B-4E-13-A0
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   Link-local IPv6 Address . . . . . : fe80::34d6:b35:3b1f:3f99%11(Preferred)
   IPv4 Address. . . . . . . . . . . : 192.168.1.2(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Lease Obtained. . . . . . . . . . : Saturday, February 15, 2014 5:12:13 PM
   Lease Expires . . . . . . . . . . : Sunday, February 16, 2014 5:12:13 PM
   Default Gateway . . . . . . . . . : 192.168.1.1
   DHCP Server . . . . . . . . . . . : 192.168.1.1
   DHCPv6 IAID . . . . . . . . . . . : 285221227
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-10-A7-F6-AF-00-1C-7E-B8-CD-B7
   DNS Servers . . . . . . . . . . . : 208.67.222.222
                                       208.67.220.220
   NetBIOS over Tcpip. . . . . . . . : Enabled

I played a game for an hour (plants-vs-zombies if you must know) in a private browsing session for about and hour, then left the computer for two hours. Computer and router both on. When I returned at 8ish, connect times were dreadful again.

When I ran ipconfig /all again at 8 pm this is the result:

Wireless LAN adapter Wireless Network Connection:

   Connection-specific DNS Suffix  . : home
   Description . . . . . . . . . . . : Intel(R) Wireless WiFi Link 5100
   Physical Address. . . . . . . . . : 00-21-6B-4E-13-A0
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   Link-local IPv6 Address . . . . . : fe80::34d6:b35:3b1f:3f99%11(Preferred)
   IPv4 Address. . . . . . . . . . . : 192.168.1.2(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Lease Obtained. . . . . . . . . . : Saturday, February 15, 2014 5:12:13 PM
   Lease Expires . . . . . . . . . . : Sunday, February 16, 2014 7:11:12 PM
   Default Gateway . . . . . . . . . : 192.168.1.1
   DHCP Server . . . . . . . . . . . : 192.168.1.1
   DHCPv6 IAID . . . . . . . . . . . : 285221227
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-10-A7-F6-AF-00-1C-7E-B8-CD-B7
   DNS Servers . . . . . . . . . . . : 2001:558:feed::1
                                       2001:558:feed::2
                                       208.67.222.222
                                       208.67.220.220
   NetBIOS over Tcpip. . . . . . . . : Enabled

The only difference is in the DNS servers. How did this happen and how can I stop it from happening  ? This could be a deal breaker. I have not contacted Verizon support yet.

Thanks in advance for any advice or solution you can provide.