Yea I wouldn't be so sure. Having teaching hospitals in itself does not make this easy. The 3rd and 4th year clerkships take years to develop. You need to train admin to administer them, need to find niches for students to fit into, find attendings who's clinical workload is low enough to make having students feasible.
Let me give you an example. Here at my school, which has been around since forever, we recently acquired a new community hospital and started sending students there for electives.
At our home site, the attendings have been teaching since the dawn of time. They know exactly what to expect from a student. They know what stelar is, what subpar is, can can coach a subpar student into a stellar one. They know tasks students can do to get involved in the ED, OR, Etc.
Our new site has all private attendings who have been involved with residents but not students. Many of them expected the students to function as residents, since that's all they'd ever known. Others treated us like premeds. Some were great teachers. Some were mean or offensive. Some taught students how to operate, some made them stand in the corner and fetch sutures. It takes a few years for admin to hear about these things and figure out which faculty students should be paired with. Which service can students excel on, and which service should not have med students at all?
These are the sort of growing pains of a new school. While it may be lessened by having established residencies and a large hospital network, it won't be eliminated. If you go to a new school, you'll be a guinea pig. But you'll also be a doctor.