I moved over from the Shag - signed up around 2010 - so some know me here.
If you followed USC recruiting over the years, or SoCal 4&5* kids recruitment in particular, most wait till signing day and they take all their visits. Our coaching staff encourages it, sighting they will never have this opportunity again, we want them sure USC is the place.
last cycle both Elijah Griffin and Isaac Taylor-Stuart took the majority of their visits to SEC schools, yet signed with USC on signing day. It can be nerve racking, but USC brings in the haul on signing day.
Chris Steele, by his own account, has been on the USC campus "a hundred times", and on first name basis with security, lol. This recruitment is like Adoree' Jackson's, he'll take all his visits, say the right thing, but end up staying home. Not saying this is absolute, but my friend Scott missed On only one recruit last cycle, and that was a kid who was torn between USC and Oregon down to signing day morning.
Also, Poly kids tend to commit to USC, we have 14 on the team.