Thanks for the information. I did a bunch of reading on soap curing and this is a brief synopsis.
-The water used in cold soap making is simply there to allow for the lye to mix; once the soap is made, the soap should cure for at least 6 to 8 weeks. A cured soap is also more mild, gentler to the skin, the PH becomes more skin loving, lathers better and melts slower.
So something else happens during the process when water leaves the soap, the PH is changed affecting lather, hay?
I talked to Lush CS and their curing time varies, but they do wrap their soaps in that clear film that one sees, it's vegetable based and I believe its cellulose. Also she agreed that the soaps do shrink pulling away. But she said that the soaps should be good for 14 months.
I'm not sure that my definition of 'good' is the same as hers though...
Then researching celluose
Cellulose is permeable film made of vegetable material. It has been used in cigar packaging forever precisely because of this, as cigars need to breath. So in the case of the soaps wrapped in cellulose, this allows the soap to continue 'curing' but curing means shrinkage so the downside of it means that a properly cured soap will pull away from the cellulose and look not so attractive. Okay for self but not so great for gift giving.