Weird as hell... two weeks ago I had a 34 inch waist with a superiallic fold measurement of 12 mm. Now it's 34.5, is noticable in a shirt, and 10 mm. The entire ab area is hard as a rock.. a lot more firm than it's ever been. There's barely any fat to grab onto (compared to a few weeks ago). I haven't gained any weight but I have incorporated a lot of 1 rm based lifting principles, especially core hitting like DL, and thrown in some low rep intense ab work once a week and am theoretically running at a slight caloric surplus. My girlfriend has begun teasing that most guys get beer bellies not muscle bellies.
Endo genetics barrel shape reasserting itself? I don't mind much as long as I'm not gaining much fat and putting weight on the bar but I admit I did like not looking like a fatass for once in my life.