If you're offered a scholarship, they are offering you one of their supposed limited spots. So how many upperclassman stick around is irrelevant. But any good program has been planning for that, as the Griz have.Well, I have been told over and over that there will be limited space for high school recruits because there will be so many upperclassman that stick around, that incoming freshman will never see the field...so not sure why showing up early matters when they will have that entire first year to lift weights.
Regardless of that - You don't see why showing up early matters to development even if they don't see the field as a fresh? Because they are 6 or 7 months further along than if they showed up in the summer. Those months can not be made up, you don't just catch up so to speak. The player arriving early is prepared to go sooner because they are bigger, stronger, faster, and know the scheme better. FCS or FBS doesn't matter, from the programs I have been to it's expected an early enrollee puts on 15 to 30 lbs of good muscle mass before summer starts.
There is no comparison to the college program strength and conditioning and skill work the player gets from winter through spring ball, because that simply does not exist at home. You don't build during the season, you maintain, all while adjusting to college. Building happens from Jan - whatever date fall camp starts. Even the structure of practice is drastically different once the season arrives.