In my experience it has never been within 10 minutes. It is usually more like 4-6 hours, sometimes longer.
Auctiva does not get new data from eBay all the time for feedback...seems like it is a lower priority.
It does not matter whether or not the person went thru checkout or any of that stuff, when they leave you feedback, Auctiva will leave them feedback...
If it does not work within a couple days then I'd suggest that you put in a support ticket.
Mike