I can see that point, It all really comes down to how these kids have been recruited. Are they committed because of CCS, or are they committed because they believe USF is the best place for them to be. Unfortunately, unless you were in the meeting and the one on one talks between the recruiter and the athelte, you can't know for sure what is being said. I just don't believe that USF is a destination spot for the average high school athlete creating a hesitation to sign early because once you sign, its official, no matter what strong or the other assistance do.
There could be an argument made that Strong (if he is secretly considering leaving) would hold off on pushing the early signing in hopes of bring recruits with him.