FWIW, I find my most of my MR points usually post within 2-3 days. There are always the missing stay requests that have to be faxed in and these seem to be about every 5th or 6th stay.

Recently I used an award for 2 nights EWR Res. Inn and had to cancel the award and it took only overnight for the points to redeposit into my account online, which was a little faster than I expected.