I spoke with him yesterday.  It really depends on
what you're e-mailing him about when it comes to
getting a reply.  Bid requests, he's usually on
top of.  He'll get back with you within 24 hours.
 If you're trying to contact him about something
else though, as he gets really busy (he's a one
man business over there) it might take him a while.

I tend to get a reply within a week though, no
matter what I'm emailing about.