Trust me I was nervous when I got the letter. I didn't even apply for the NW track. I specifically checked the "no" box on the secondary where it asked if you wanted to be considered for it. So I was really scared that my acceptance was contigent upon me participating in the NW track program. But Susan Hanson, Director of Admissions, told me that I did not HAVE to participate in the program, and that my acceptance was still valid. She said the only reason I was approved for it was because of my prior residency and graduation from an Idaho university. I even told her I was worried about a contingency, and she told me it was not the case (for me, at least). Anyway, I'm relieved, and really glad that I got in anyway. For sure, my MCAT score was overlooked in this case. Granted the rest of my application is quite strong otherwise, but I knew that COMP had a higher MCAT average then most schools when I applied. Whew!
Edit: I should also say, that I will not sign the contract that DOES require one to participate in the NW track rotations. Susan told me not to sign it, and to make a note on my accpetance contract that I decline participation in the NW track (but accept a position at the school). Perhaps when you say all people accepted through the NW track HAD to do their rotations in the NW, did actually sign their contracts, and thus were bound by that agreement. I doubt I'm the first person who's been offered the NW track program and declined it. Susan didn't make it sound like this was a big deal, or a "new" problem that they had never faced before.