I used to routinely pull the membrane from StL ribs. Then I tried them once without it. Haven't ever pulled the membrane since. Just made up 16 racks for a local event. Hoo, boy did those ribs vanish quick! Truly, there isn't a ton of difference. If I were cooking in a competition, sure. But when I have to do a lot? Especially if the guy who cut up the pig was careless and the membrane's all cut up? No way.
seattlepitboss