The Commandant came and spoke at the local Founders Day Dinner. I believe I remember the following statistics correctly:
During last year's summer training, 10 cadets went to Combat Diver school, 9 passed (one got an inner ear infection and could not finish). 20 cadets went to Special Forces Assessment, all 20 passed. I can't remember the number, but some also went to Sapper school. They all passed and one was the Distinguished Honor Graduate of the class - over active duty officers, ROTC cadets, enlisted, etc. He said the overall pass rate for USMA cadets at Army schools was 96%.
Airborne and Air Assault are much more available for cadets during the summer. As has been noted above, Ranger school is not available until after you graduate, but is then part of the training pipeline for Infantry Officers.