However, it ignores a few things. There is always an advantage to being ahead, even at state schools.
Come in with more AP credits or college credit plus? - Get priority scheduling over your peers
Get priority scheduling - More likely to be able to graduate in 4 years
Come in with more credits, take less gen ed requirements and get into a major earlier - Build relationships with faculty in your major sooner, more opportunities come your way, internships, etc.
It's compounding, but instead of for interest in your bank account, it's your life.