We're sort of straying from the topic here.
"Does the number even matter?"
No, the number is completely irrelevant. I've ran at under 20-30% resources under Win9x with a Cyrix and Winmodem and not lose the connection. I really doubt that by having low system resources you can actually drop a connection.
If they are too low on resources, tell them to quit playing games and do their job. 😛 But seriously, they should not be too low on resources - what kind of systems are they using? Serving the net does take a certain amount of power, but unless your systems suck, you should be fine with that...
-RSI