Can you lower your ping by configuring your router?
I beleive that the ping depends mainly on the speed of your internet connection. Might be that if other services are running on a PC behind the router that also up/download stuff to/from the internet that these then affect the ping too. But I doubt you can do anything about your ping just by configuring your router... anyone who knows better please feel free to correct me.
I know about packet bundling techniques that many DSL Providers use in Germany that also affect your ping - if you want to get rid of this, you will have to use the "fast path" option for your DSL contract, but that usually is available only for a higher price.