List subscribe time?

Hello -

 I have a colleague who is trying to subscribe to this list, and send an email to user-subscribe@...<mailto:user-subscribe@...> .

 Just curious how long it usually takes for that to work, or if it's moderated...it's been a few hours, and we're wondering if there is a problem, or if it's just in an approval queue somewhere.

 I've been subscribed for so long, I've forgotten! :)

Thanks!

 Tim