Hello aob90,
Want to let you know that we do not throttle any connections. What this sounds like is a routing issue as when you use a VPN your connection may be taking another route. Does this only occur when using Netflix or does this affect any sites you navigate to? You can test this by running tracerts using both your standard and VPN connections and compare your readings. If you would like we would be happy to look at them as well. Please reach us on Twitter at @CoxHelp, visit us on Facebook, or email by at cox.help@cox.com. Provide us the name on the account with the full service address with a link to this thread so we can get started.
