most of my classmates (@ LECOM) don't want to do primary care, and when i interviewed, i said i didn't, and my interviewers didn't seem to care at all. one of them even said she never had an interest in primary care either- she was a DO infectious disease specialist. (although i wouldn't necessarily tell them that during an interview, unless you knew a little about your interviewers).
LECOM has a lot of space for electives during the 4th year and they encourage students to do whatever and go wherever they can. thats not to say they wouldn't love it if we all went primary care. however, neither our dean nor our president are in primary care, and the faculty is always joking how everyone wants to specialize these days. i have no actual statistics, but at LECOM the attitude is pretty much do whatever you want- they know that many of us will specialize, and that primary care isn't for everyone. Many of our lectures are given by clinicians who are MDs anyway . . .