There is currently no option to do this. This would
also be pretty
difficult to implement as it would require completely changing how the
current commenting system works.
Really? I've thought about this too, as it would be very useful.
I don't know much about the MW code, so I thought it should be as easy
as changing
$pageContents = $pageContents + $newComment;
to
$pageContents = $newComment + $pageContents;
(that's pseudo-code, obviously)
Guess I was a bit naive then...
-- F.