@rchrd Yup, all accurate.
But its important to note what works best for the mean is not the same as what is best for the individual.
If you must apply a standard for everyone, find the best in mean and go with it... but if you dont need to then find what is best for the person, regardless of the mean.. I have no doubt 10mm is the superior shot for some people (perhaps those better at handling recoil) and not the superior shot for others.