In the current MXA, a "suspension guru," and I don't mean that in a negative way, says sag should be set with the rider in a normal sitting position. Everything else I have read says standing to eliminate errors in repeatability is preferred.
Can someone clarify which is correct?
If you are sitting in the correct position there won't be much difference between sitting and standing. The main thing is you need to sit or stand in the same position everytime you check or adjust your sag. But do try to get as close as possible to being right over the pegs.