The 90% should be the statistic for the old direct admission. In that case, if the requirements were satisfied, the admission would be granted. I guess that 10% could not make it.
I am not sure what the new practice will lead to. One example is quinnipiac direct PA program changes to two parts this year: direct PA and pre-PA. There is no guarantee for the pre-PA group to get into the PA program. For the direct PA program, all you need to do is to satisfy the requirements. Of course, some students in the direct PA program can not make it each year, but it for different reasons other than the school does not accept the students.
I remembered clearly when we visited Drexel a while ago, they indicated clearly that the old program was too difficult for some students so they were about to change the program to early assurance program. I guess the new program is too young to tell.