All sprint coaches obviously are not the same, nor do they all share the exact same training philosophy. If he had several women make it to regionals and had one at the Olympic Trials, I would assume he had talent to work with and did a good job with them. As for the men, maybe he just didn't have the talent to be as competitive. If he is level II in the sprints he knows the basis of training for sprints and the do's and don’ts, as taught by USATF very well.
Most older accomplished coaches with great resumes' never attended the USATF coaching education and just continue to do it as they always have done and do it with the most talented sprinters coming out of high school.
The old school or Western (USA) training for sprinters was; first to condition the sprinters with longer aerobic runs and tempo runs and strength endurance, gradually introducing special endurance, speed endurance and then speed. This method has produced the world’s greatest sprinters in the last 100 years.
The new school or Eastern method is to train the sprinter as a sprinter from day one with short sprints, using the energy system used the most, the anaerobic ATP-CP & anaerobic glycolysis. In this method they start short and build up as the training and season progresses.
A lot of today's successful coaches’ combine both methods during the conditioning phase and then during the outdoor season concentrate on speed and speed endurance.
The summer workouts he has given you is O.K. The intensity level and distance of the sprints will pick up as the conditioning and season progresses. Remember the collegiate season is so much longer and intense than what you went through in high school.
You say that you picked your DI institution because of academics and that if you do run well and are not satisfied you would walk-on to Northern Iowa or Minnesota. Why would you not be satisfied if you are running well and you like the school's academics? FYI......Northern Iowa and Minnesota will both have new sprint coaches this upcoming season.
I assume you are from and are attending a university in the upper Midwest if you want to walk on at UNI or Minnesota and both of these programs have had very good sprint teams in the last 7 years or so. Will this continue? I do not know.
If you are concerned about his workouts, ask him what he plans to do in the fall, winter and spring. Since you are new to sprints, initially you will probably not understand all the cause and effect of the workouts. Trust in your coach and give it 100%.