The whole reason you sign 18 4-star players is because you know about half of them won't pan out. If you sign 25 guys and you get 12 to pan out then you have done very well. This holds true for teams like Texas on up to teams on the level of LSU and Bama. The real difference between a 3 star 4 star and 5 star is how quickly you can get them on the field. 5'star guys are supposed to be able to contribute from Day 1. 4'star guys generally need a redshirt year but give some early help. 3'star guys need to redshirt and get stronger or get more coaching before they can contribute. They see the field in year 2 or 3 in the program. Below a 3'star and they are projects that might contribute as juniors or seniors. There are a lot of reasons why a guy doesn't pan out injuries, grades, muff, luck. It's just important to know that it's normal to see 50% of you class fail. That is the difference between Texas and a team like Tech or TCU. Texas gets twice the number of 4/5 star guys as they do so when one fails we have another to take his place, and that is the current difference between Texas and say Bama and LSU. They have even more than we do.