that’s not roadrunner. and even to dreamhost those aren’t real bad pings.
If you want to know if you have a bad roadrunner connection you should use a speedtest like http://speedtest.net
Compare the results there with the speed tier that you pay for, if they are significantly different the first thing to try is rebooting the modem (also plug your computer into the network, if using a wireless connection you may get invalid results). The second thing you should do is call for service, one single bad or weathered connector or worn service cable can cause a really slow connection.
Have you tested the from another location? my bet is still on overloaded server…
Additionally you can use a utility like firebug to watch the page load in real time. My guess as to what you are talking about is “time to first response”, if that’s the case then server load maybe an issue.