Ranking by Offers supports the opinion that Pitt's class probably was slightly undervalued due having a bunch of kids just below the star cutoff. #33 on a 20 person class.
http://www.rankbyoffers.com/2018fbteams/
Aside from the more obvious question about commit-able offers it suffers the same problem as other ratings systems in giving a bonus for having more recruits in a class (up to a cutoff of the NCAA limit of 25).
On that basis Pitt is still #8 in the ACC overall.
A more positive observation is that Pitt is #26 in average ranking per individual recruit using this method.
Nevertheless, I believe that average ranking per recruit is a better way of assessing an individual recruiting class since the NCAA 25/85 rule is what drives the number of players in a class--anything more than 25 is the result of gray-shirting or back filling a prior class of under 25 with early enrollees using ships opened due to overall roster attrition (from the 85 number). No school is giving out fewer ships than they have available in any given year.
Bottom line, in reality the best way to mathematically judge (what is an inherently subjective system) a schools recruiting (while ignoring subsequent player performance on the field) would be to take an average of the average value per recruit recruited over say a 5-year period to allow for the effect of redshirting.
Hypothetical Example of a Hypothetical School (using average stars):
2018-- 20 recruits Avg stars/ recruit = 2.85 = 57.00 total stars
2017-- 23 recruits Avg stars/recruit = 3.25 = 74.75 total stars
2016--25 recruits Avg stars/recruit = 3.35 = 83.75 total stars
2015--25 recruits Avg stars/recruit = 3.05 = 76.25 total stars
2014--24 recruits Avg stars/recruit = 2.90 = 69,60 total stars
Total--117 recruits<-------------------------------> 361.35 Total Stars
361.35/117 = 3.09 average stars/recruit This is the number you would compare to other all other schools recruiting calculated by the same method.
This would provide a far better sense of how a school is recruiting than the present flawed methods which are only for fan entertainment anyway.