In theory you’re correct, but not for this particular school. Case students generally
Sure, but this is a caveat for every school, not just Case. And I think it should be noted that Case's average Step 1 score is quite high (mid 240s -- on par with Penn and Mayo). Assuming the average Case student does well academically, it seems they would have their choice of residency (they may not be Harvard, but it's also not a no-name state school).
Looking at their 2016 match list, it definitely looks like a lot of students matched to their home program (as with any school), but there are a decent number of top academic centers included on the list as well (Cleveland Clinic, MGH, Penn).
Also, I'm not sure whether this includes the match results for the CCLCM students. Their match list is even more impressive (almost all top academic centers).
Anyways, I just brought this up because I found it interesting (and to see if anyone has any insights).
http://www.casemed.org/uploads/2/1/6/3/21638048/2016-cwru-match-list.pdf