One of the best ways you can pickup your speed on the internet is to find DNS servers that will get you to where you want to go faster. If you would like to know how your DNS servers are helping you or hindering you, then download and run Steve Gibson's excellent DNS Benchmark tool. I use OpenDns nameservers and his utility told me that it would benefit me to just switch the order of the servers and its should make a significant difference.

Steve Gibson's FREE DNS Benchmark Tool