I don't think that was the issue. They were just letting people know of a linux alternative for running c5. For render nodes this could be a plus, since cost could add up per machine...many commercial companies  use alternative os for this reason among others.
ggrace,
That's where it would really matter is w/ render nodes. There is a benchmark thread here, I believe in the backroom, possibly.

No need to think outside the box....
    Just make it invisible.