I think most of the high pings are due to the way your ISP routes your internet traffic. Seems like they like to take the longest route possible. So before going off the bandwagon and blaming SE, please check the way that your ISP routes your internet traffic.

Also, I believe that it could depend on how old your equipment that you use to connects to the internet. Things to question is: Is your Cable/DSL modem new or order? How old is the Cable or Phone line going from the pole to your home? Things do wear out over time and doesn't perform to it's standards and should be replaced. Plus, if you have all newer equipment, that doesn't mean that your ISP has newer equipment. All we know is that they can be using outdated stuff and also that can effect your performance even if you have newer equipment at your house or where you live.

But I do feel for the people who plays outside of the US that plays on the NA Servers. I feel that no matter where SE placed the Servers, it wouldn't of gotten any better for you.