Depends on how long the band gives me, I recommend two days for a four song E.P and then I get it pretty damn good.
Last thing I did was four songs in a day though, it came out something like this:
http://gearslutz.com/board/showthread.php3?t=36035
It's not perfect, it worked for the client, but not as good as I'd of liked.
I've noticed I'm getting better at being quicker when I'm tied to a time budget, I'm not 'there' yet but getting better.
Cheers,
Rich