Brutally draining the battery while aSleep should never be called "supporting Sleep".

And even before then Sleep was very hit-or-miss anyway. I've never used Sleep because it's just far too inconsistent and thus unreliable, compared to just shutting the thing down when I don't need it for a while.

Still, TFA is about putting a server on stand-by. A server is not going to run off a battery most of the time, so it's not very relevant if it's drawing 4 W instead of 1 W. Even if it's not running at the absolute minimum power level, by putting it on any stand-by mode it's going to draw an order of magnitude less power than if it's idle.