Good questions, wdb. I think with LP one needs objective measures. People get LPed (like being hypnotised) for 3 days and one of the things to say is that one isn't "doing M.E. anymore". So if somebody asks you, saying how well you are is part of the treatment. If you go for a walk, you are not supposed to tell people how many rest periods one had. The numbers doing LP were small (101) with 26 people saying they were "greatly improved" - one could see how the process could be corrupted e.g. some therapists filling it in. Also, what often seems to happen is people are on a high after doing the treatment - but crash later on. So if you have people who recently did LP, that would imbalance the figures. One wants to see long-term improvement with a treatment ideally - not just temporary highs.