I believe that in order to recruit at that high level, a program/coach needs:
- recent success
- great facilities
- geographical advantages
- a coach who doesn't recruit solely with a smile and the promise the kid will play for a "good guy"
That is not a knock on Riley, but from what I can tell, Harbaugh and Meyer are both a-holes. But they're type of a-holes players are willing to tolerate to play for to play for a winner. Nice doesn't seem to get too far any longer.
Basically, they're (Harbaugh & Meyer) salesman who lay it on the line and tell the truth, even if crude, crass, or unethical. Or even douchey. I don't really know much about Saban, but I would guess he isn't exactly on the up and up, either. All three coaches, however, have enough talent in their radius to consistently deliver a perennial top 10 class, however. But their history of coaching style, success, and recent program success garners them players from outside their respective radii.
Nebraska has enough recent wins, success, conference champion game appearances, and supposed lack of talent to recruit and promise immediate playing time to any recruit. The geographical challenge will always be there until we're winning 11-12 games/year. On average, we don't have a top 10 class of recruits in our radius. That's why we recruit nationally. And why we just need a salesman who can sell a ketchup popsicle to a woman who has ketchup popsicles for hands.