The word is that they are trying to improve the image of the program by becoming very selective in the application process. Its hard to do with 13 spots and an already 'malignant' reputation but they are trying. There already has been major changes in the program since Dr. Moroz became PD, as new residents are finding that the program is less malignant than the reputation suggests and the changes will continue to re-establish the desire for top applicants to match at this program. How does recruiting top applicants improve the image of the program? Think of the residents you met on interview day. Also think of who buys BMWs, MBs and Lexus's (Lexi?) and who buys Escalades (same price) and what you see yourself driving. Exactly.
The 3 spots filled quickly with outstanding but unmatched applicants who interviewed there but did not rank Rusk, maybe because of the odd interview day and lackluster response from residents in correspondence, plus the reputation of the residency experience, plus lack of housing options in the most expensive area of Manhattan, plus whatever else. In comparison, NYP-C/C beat Rusk in all of these aspects, which made it a more attractive program. I believe that at NYU you get much more patient exposure, just by the shear number of the patient load (about 3x that of C/C), but of course this translates to much more work and longer hours and perhaps greater unhappiness. If you're not the type to take advantage of this aspect, the increased patient exposure will not benefit your fund of knowledge and clinical judgment, and it just means you're putting out fires and feeling out of control and overworked. Facilities are of course the oldest in the country as well, which makes the newly renovated Cornell look like Camelot. However they don't show you the facilities at Columbia for good reason, (although I think its still better than that at Rusk, but not by much).
I'm not trying to make a plug for NYU as I know that there are much better places to train such as Kessler, RIC, and the rest of the Super Six and a few others, but someone asked why NYU spots didn't fill and this is my best opinion.
As for the match, congratulations on where you ended up and if you're stoked, savor it and tell everyone about it. If you're at a place where you feel lukewarm about, make the best of it and know that in 10 years it won't matter much when you're making $230 a year or more, raising kids and living in that house with the white picket fence, driving your MB (haha so I'm biased), or after your fellowship (think of America as the land of 2nd chances - and third and fourth). If you didn't match, again think of America as the land of 2nd chances - but be honest about where your weaknesses are and fix them because PM&R will be more competitive next year and beyond. Don't blame circumstances and bad luck and other things you can't control, you can only add to your CV. Have courage and rock on!