Yes it does seem mostly like trudging through mud with lead boots lol
Regarding your question, there are a few variables concerning movement speed:
sv_maxspeed - main one
cl_backspeed
cl_sidespeed
cl_forwardspeed
I wrote this from memory and not sure if entirely correct, but you should set them up to something like 500. I think the server sets them about 400, running speed. Again not entirely sure of the exact values
Have fun
G
_________________
The gemstone of gaming is Quake, so load it up and play some