The really important factor in slo/lo cooking could be breaking down collagen and rendering fat.
When folks talk lbs/time they might be talking an 8 lb butt,or 15 lb packer.
Think about running a band saw across a butt,or packer and having a 3/4 inch thick steak.
Put it in a 350ยบ skillet for three mins on a side and it will be cooked/done to meet the safety chart,but could you shred it with a couple forks?
Has it rendered all the fat?
Could you even chew it?