Depends. If you are pulling movies off the server with limited other trafic, you won't see it.
I record OTA to the HTPC and that raw movie is transferred to the Server (WMC option, set up using extras)
The OTA show is also run through MCEbuddy on the HTPC, output to MP4. The output is stored on the HTPC in a unique folder.
This is set up per Assassin's guides. About once a week I'll copy all new MP4s over to the Server. Frequently the MP4 to server
is a 30G+ transfer, and at that time the HD Prime signal will show interference.
BTW, I have a less than optimal netwoork between the FR HTPC and the server/Network HD Prime Tuner. The signal goes
through a router and two switches. The Attic/craw space is just cooling down to where I can run a direct line from the FR router to
the switch in the Server Room