To test your connection you can download
PingPlotter It's a free program used to test the connection. In stall it and in the box type the server address for the game server 71.252.137.149 Let it ping for once every second for 10 minutes or so. Any "red" is bad. If you want more details, take a screen shot of the program and post it here.
More often than not you'll see others warp if your warping too. The other thing that may cause a warp is the guy doing the complaining may have a weak computer and he is pushing it too hard with extra eye candy but it only really shows up when he dives into a furball, or a big spawn camp.
In the game, you can right click the map and select "net status". When the page swings out you'll see two blue boxes. The white line running through them should be flat. In the top box you might see some small peaks as this is your computer loading stuff, new planes coming into view and such. If it is spiking all over the place you may be having issues with some other programs running in the background.