I actually didn’t ask about there previous PE routines, that is a good question, I should have asked.
That is the key question. Without that it tells us nothing about the validity of the surgery. We know people can gain using hanging and stretching devices. What needs to be established is if cutting the ligs make these gains any easier to achieve.
You should also ask about pre and post op measuring techniques. One of the biggest problems in PE in general is the inconsistency people use when measuring.