So, you are saying a high school player coming into college has already been taught every skill required to gain separation when running a route against a BCS-level receiver, and it's just a matter of tweaking those skills for BCS? Or that a high school player should have all the skills necessary for holding on to a ball after getting slammed by a BCS-level corner or safety? Interesting...
I'd say most of the high school receivers who are good enough to play BCS ball simply use their athletic ability and run away from their defenders most of the time, and rarely have to fight off a corner to get free. The ones who actually have the skill set to fight off a BCS-level defender end up at OU, UT, and the like, not ISU.
Right now, ISU is getting the best players they can, it appears that those players need improvement in their skill sets. Until ISU is winning 9 games a year and walking out with a handful 4-* and 5-* recruits every year, the coaches better be up to the task of imparting those skills.
The coaches that I know here in Texas that have spread teams teach their players skill and fundamentals used at the college and pro level. They teach press release drills, techniques on how to hold your route, high & tight ball handling skills, etc. They go to coaching clinics lead by college and pro coaches to learn from them. They visit their practices to watch drills, etc in an effort to be a better coach and to gain knowledge and techniques to develop D-1 caliber players. Also, because many of the spread receivers are smaller/quicker body types, they have to be good at these skills to be effective....and to get recruited.
If you know your football, there are plenty of 4* and 5* guys that are rated that high simply because of their size. That doesn't always mean that they are players. And you know what else, many of them go to OU, TX, FL to name a few and never see the playing field.