My experience is about 2 hours. Seriously! There is a supervisor at MP which credits my flights in about 2 hours of her receipt of the boarding passes and flight coupons.

When I did the Baht Run last year, she credited 84 segments in a matter of hours. More recently, when I have faxed her the documentation, she has credited the flights and then called to inform me that it was complete.

I may be faxing her later today, as I have a few flights from a few days ago which are not showing up....