In an attempt to answer my own question, I googled “average national college football recruiting rankings” and found this:
https://www.sbnation.com/college-fo...llege-football-recruiting-rankings-2018-class
According to this SB Nation article, Georgia Tech’s average recruiting rank over the previous five years (up to the 2018 year) is 49, and South Florida’s is 67.
Let’s see, this is an 18-point difference in the recruiting rankings (67-49=18). Therefore, Georgia Tech should beat South Florida by 18 points this Saturday. (TIC)