I would tend to agree here.
When using my SMLE No5 I find the short LOP to be fine: it allows for smooth use of the bolt and sets my eyes well on the sight (Battle sight while standing, flip-up adjustable while prone) in heavy brush. The modern stocks I think are more set to use with optics that tend to need more space to prevent scope kiss, need more space to clear the bolt by the optics and need more length to operate the bolt with modern rounds. Modern scopes tend to sit with the eye piece behind the rear sight, where pictures of WWII scoped rifles I have seen had the eye piece in front of the rear sight since scoping it was not designed into it.
Size of shooter and gear, in my opinion, were not as important as getting an "average" sized LOP for the application.