Hunter-Bellevue has always been a very selective and difficult program, period. This is not just compared with other CUNY BSN programs, but all BSN programs in NYC/NYS and probably up there with other hard programs as well.
IMHO Hunter prepares one to become one of those super critical thinking and theory laden BSN nurses that go on into graduate studies and so forth. If all you wish is to become a good bedside nurse, then you probably can do just as well at Beth Israel or any other program.
Pre-nursing is the best time to make your move, so to speak, but consider at the moment getting into any NYC area nursing program, especially the good ones is going to be difficult. While a 2.7 is not that shabby, and above what most community colleges require for entry into the nursing program, your odds of acceptance into a college program increase with your GPA. The problem (if that is the right word), with Hunter's program is it attracts the creme de la creme of those seeking a BSN degree from a CUNY school. City College disbanded their nursing program years ago, so the only other choices left in Manhattan are NYU and Columbia. No, scratch that, Columbia only offers graduate degrees, so there you are.
As for CUNY schools in general being the most difficult to gain entry into, I don't know about that. It all depends on how popular the program, number of applicants and strength of the applicant pool. If the nursing shortage was not being shouted from the house tops and the economy going down the tubes, you might find far less persons applying for entry, thus one's chances of being accepted would go up, even if one only met the bare minimum requirements.
Finally keepone thing in mind. Both pre-nursing and nursing programs
in general are hard and demanding to weed out the weak, so to speak. If you cannot handle the course work in a school's pre-nursing sequence, you probably will find the actual nursing program difficult as well.