TMI, but I've experienced similar, after a couple high-sugar snacky cheat days. Except that I believe the 5 pounds is *ahem* both BM's and water weight. My body seems to like to retain water until the BM's, and then release the water.
Originally Posted by otzi
5'0" female, 42 years old.
Started Primal October 31, 2011, at a skinny fat 111.5 lbs.
Current weight: 101.5. lbs and holding steady. Spring yardwork here we come!
Co-worker 1: Needs to lose ~50. Now he wants to start Mayo Clinic Diet. Yeesh. Give it up, man.
Co-worker 2: Needed to lose ~55. Lost 20 from stress. Started Primal in Sept, lost 20 more, but gained 10 back on a carb spree. We're working on it.