This may be a useless factoid, or it might help someone: postoperative ileus is the condition of the stomach motility after surgery. Mine is taking twice as long to return, even for digestive system surgery. I wasn't really too concerned, as my stomach was shutting down before surgery; it's more of a nuisance so far, but of course I worry about adequate nutrition.
Anyway, the weird thing is that ileus (the motility) returns in this order: bowel, stomach, colon
Btw, gum helps as much as anything.