I think you're right, palodeagua (welcome, btw!) In fact, if you look at the source for the SBV column, it's Deborah Ruf's levels, with her Level 4 equated to PG. Now, quite apart from what you think of the Ruf levels (it seems that her level indicators and numbers are more based on her experience than on reviewable data, shall we say), she doesn't use terms like EG, PG, at least not in the referenced article, so I'm not sure who wrote that table that way and why. What she does say is that children at her Level 4 are found at the frequency of about 1 in 200, i.e. they are above the 99.5th percentile. That suggests that Level 4s are roughly 3 or more SDs from the mean, i.e. say 145+ (in fact, not 135+ as she says in the article). But, anyway, not anything like as rare as the other definitions of PG in that table.
