To add to that, lionhearted posted a comment about inevitable site decline because of open membership and equally weighted voting. What if only accounts over 1 year could vote (or diminish their vote weight)?
Wouldn't instituting a min. length requirement and taking away new user voting improve the problem significantly?
On your other point, I'm thinking that short unwanted quips can rear their ugly head anywhere along threads.
(Or at least, that's what I assume it's like -- I don't know, I've never been invited into any elite prestigious clubs...)
Even if you say "Oh, it's just a time requirement", what are you gonna do if Big Name Smart Person shows up wanting to comment? Surely you're going to let them in. So now you have an elite line and an unwashed line and you're arguing about who should be in the elite line.