Rivals and Scout have become "slicker" with their sites...but Emfinger has been around forever. Used to get his magazine...before the Rivals/Scout era. He is as good as any of them, they are all subjective. With him showing us at 5, I would love to say he is right...but who knows.
There have been many dispell the use of these rankings, and technically, they are right. A top class doesn't guarantee a single win. But, watching what teams are going for what prospect does show the most coveted recruits. Simple fact, Bama and FLA have had top 5 (or better) classes the last few years, and I think it is pretty obvious what they have reaped from that.
Proclaim the rankings mean nothing all you want, but there is a correlation. If you can take a topflight recruit with good size, speed and skills and coach them up, you will get a superior performer.
Step 1 - get the best athlete at the position
Step 2 - instill higher level performance and teach the proper techniques
Step 3 - prepare for your opponent (tapes/gameplan)
Step 4 - drive execution
All the while, ensuring these kids stay straight and inspire them to not only perform, but be good campus and community citizens.
Big task for coaches.
Watching and tracking recruiting is simply step one in the process....that, obviously, is why it is of such interest to most.