As far as I know, no admins are currently allowed to have 'deleterevision'. See bug 18780 and bug 19697 (esp. bug 19697#c8).

Recently it seems to be allowed (bug 20331, bug 20926). Bug 20186 is indeed troublesome, but the current full-page delete/restore method even more so: it is fully opaque to non-admins (and thus a potential GFDL/CC violation), it can misattribute edits, does not work on logs and pages with long histories, and borks the browser of the deleting admins on slightly shorter ones (displaying 4000 list elements on a single page is not nice). The same is even more true for the other problems mentioned in bug 18780 (users would certainly prefer an inconvenient log to no log at all!), so unless there are more technical problems with it which I didn't grasp, I think it would be an improvement even in its present state.

I have asked on wikis which have single-revision delete enabled:

http://pl.wikipedia.org/w/index.php?title=Wikipedia:Pro%C5%9Bby_do_administrator%C3%B3w&oldid=20775693#Experiences_with_RevisionDelete
http://he.wikipedia.org/w/index.php?title=%D7%A9%D7%99%D7%97%D7%AA_%D7%95%D7%99%D7%A7%D7%99%D7%A4%D7%93%D7%99%D7%94:%D7%A9%D7%92%D7%A8%D7%99%D7%A8%D7%95%D7%AA&oldid=8429855#RevisionDelete

and it seems to be working fine.

jeluf wrote:

Done.

'huwiki' => array(
    'editor' => array( 'noratelimit' => true ),
    'sysop' => array( 'deleterevision' => true ),
),