I don't know about the school admins...but my medical school guidance counselor has consistently told us that a narrow application strategy for CaRMS is a NO NO, and apply broadly and always imagine the WORST scenario for CaRMS.
The hard thing about competing with medical students, is that everyone is good and we all work hard...so I could imagine how hard it must be for selection committee to turn down students for interviews.
I guess that it depends on what you really want, and how comfortable of you are with not getting your top specialty?
Some people prefer to not match, and take a year to make them more competitive and apply the next year.
Just wondering what are the school admin saying these days about competitiveness and backing up? Seems many specialties including Internal has been consistently competitive in the last few years. Are the admins more wary these days of not matching?