@etibbs. @oscarmom1 …no, last year there was 7% acceptance off the waitlist.
See https://case.edu/ir/media/caseedu/institutional-research/documents/pdfs/2016-2017-CDS.pdf
and
http://talk.collegeconfidential.com/case-western-reserve-university/1974204-cwru-waitlist-faqs.html