The default settings for cs:s are
rate 30000,
cl_updaterate 20,
& 32 players.
The de_dust2 server uses sv_minrate 15000, sv_maxrate 75000, sv_minupdaterate 33, sv_maxupdaterate 66.
Many people change their updaterate to 66, but leave their rate 30000.
You may recognize my spray. The servers...