I have replied to Gunther with some details of my testing of this issue via the Support system.
I wanted to add a comment here as well.
I do infact see a cpu usage increase of about 12% on my system.
However, further testing indicates that there is no performance loss.
Infact, cycle rates increased on my system during simple TCP stream tests, and during video playback and analysis the activation of a TCP stream appeared to have no real effect on FPS or Cycles rates.
We will continue to look into the cause of the cpu usage increase, but I feel confident that usage of this feature does not effect playback negatively.