What would Tanktop do about packetrate? I thought you just said it was a client-side setting.
From TweakGuides:
Multiplayer Commands
Note: The bulk of multiplayer-related commands usually start with sv_, net_, cl_ and g_. The most important known MP commands for players (clients) are covered below:
cl_bob [0-1] - Determines the extent to which your weapon bobs and sways as you move; 1 is the highest, and fractional values down to 0 will steadily reduce it to nothing. This is the same as the in-game Weapon Inertia setting, however the command may be useful if you just wish to adjust your weapon bobbing 'on the fly' within multiplayer.
cl_bandwidth [value] - This setting determines the maximum bandwidth in bits per second to use when communicating with the game server. You can try lowering this value from the default on your system to see if it helps stabilize your Ping (system).
cl_packetRate [value] - This setting determines the number of packets per second sent from the server to your machine. You can experiment with lowering the packet rate if you find packet loss (manifesting as in-game warping) is quite high (system).