This is true. I think some of the time it's really up to the delivery person as to how much room they have for what on any particular day. We live in a rural area and our mailman drives a car.
I just heard something "wonderful" (as many are waiting for the next issue of The Quilt Life) - Did you know that the post office can hang on to magazines (or other bulk mail) for up to 7 days. That is why you often get all your magazines on the same day. I am checking into this -