Actually, yes.  Especially for short notice, if a lady is available you will get a PM.  Otherwise it's not that easy to book same day with a lot of top providers.  I usually try to book 3 days to a week in advance.

Sure does, actually better than calling or emailing most top providers on short notice.  Check out my white list referrals, they mostly contacted me in the past that they weren't busy when I was coming into town short notice.

Sometimes they like to hold up a fish and watch the hungry seals jump.

And that....is why the site has an ISO board.

Again, short notice, whose available and of course variety