use of vncviewer and impact on personal bandwidth

I agree with lee551's and johhn's observations,when i personaly use the vncviewer or tightvncviewer i register the same low bandwidth utilisation.
If you use KDE you can try Krdc (Remote Desktop Connection).

Thanks all for your responses.

There is no doubt that it's happening EVERYTIME I run it. It takes no time to build up (bandwitdh shoots up right away).

Sorry for the paranoia here but, is it possible that someone uses it as a door and taxes my bandwidth?