I have occasional performance issues in-game as well. Often I'll be running and not be able to change course because the game won't respond to my commands. Other times I'll sit down and then "teleport" across the terrain as if still moving forward. I simply attribute these sorts of things to poor server performance or high latency (I have a hard line connection, not wireless).
If there's a specific issue with your wireless router, you'll probably get better responses from your router's tech support site / documents, or from a site like
www.dslreports.com.
As long as the issues aren't gamebreaking (i.e. doesn't cause a crash or disconnect) then it's probably not a big deal, and is simply a minor performance issue.