Holy cow, I wrote a book!
This is one of those "Oh, that's an easy change" bugs.
The discussion probably went like this:
Some guy whose idea this was:
"For stability reasons, we want to lower the default video acceleration
for Server a notch. Dear Video Setup team, can you do that for us?"
Video Setup team: "Sure thing, that's no problem.
The default setting is all done by us; it should not have any impact
on anybody else. We'll just do it and be done with it."
Guy: "Sweet. Thanks."
And bingo, the default video acceleration dropped to one notch below full
on Server, and everyone was happy.
Except that there's this text tucked away in the Display control panel
that has the word "(recommended)" next to "full acceleration".
That didn't get updated. Oops.
(I wouldn't be surprised if there is also some
help text that didn't get updated for this change.)
No code is an island.