Were he to be at this conference, perhaps he would have identified "Micro-Paradigm Shifts" that follow the same pattern but are limited to a smaller field. As an example genetics is slowly challenging the Bipolar Disorder I/Schizoaffective/Schizophrenia rubric and imply they are all the same. Most people say it's bunk and others simply carry along with DSM-V and ignore the debate and implications. But if these diagnostic categories are wrong then the entire field of psychiatry has been traveling down the wrong path (and misdiagnosing patients and potentially mistreating them) for eons. Certainly that would qualify for a paradigm shift.
Similarly there is probably some finding at this conference which is "upsetting" to some attendees and challenges the known order. Perhaps what we really need is a way to identify the early stages of shift where/when someone challenges "normal science."
In terms of medical student training we might look for evidence of unease. For example, the emphasis of the "new" topics (economics, big data, data analysis, communication, coordination) isn't really causing any unease. Annoyance, frustration and perhaps irritation for some, but certainly not unease. So this is still "normal science" of medical education. It's just adding topics already to crowded curriculum (which lacks coherency, recognition of unsustainability, or relevance to the actual practice of medicine - but I digress.)
In contrast arguments that medical school should be reduced to 3 years (which I find compelling) have been greeted with unease. So any challenge to the "medical school takes 4 years" paradigm [Duke's replacement of one year with a research year seems a sneaky way of implementing change without causing unease] would seems to be evidence that a shift is happening. The actual shift may not be to 3 years. It may be to an entirely new approach (distance learning, individualized curricula, varying lengths?) to medical school training. But to me identifying unease is the key to identifying potential shifts, and changes to the 4 year plan are about the only change that I see that causes unease.