This is a very dangerous line of thinking, in my humble opinion. The USMLE's are just that: standardized exams. Three USMLE passes do not a physician make. The culmination of the years of basic science (6 years including undergrad) in addition to the clinical knowledge in the upper years of medical school and beyond are what truly solidify the knowledge of a physician. Step 3 is taken after intern year and is most often reported to be the easiest of the 3 licensing exams - and yet, interns must undergo an additional two years
minimum to become an attending.
Upon completing a minimal 3 year residency, the physician will have trained for a total of 20,700-21,700 hours compared to just 3,500 hours for a DNP. That is a difference of over 15,000 hours of training!
We already have good data on the pass rates of the much less involved and watered down Step 3 exams for NP's attending one of the most "prestigious" Universities in the country:
2008 Certification Examination Results - First-time Takers Number Tested Pass Rate DNP Degree Examinees : 45 49%
2009 Certification Examination Results - First-time Takers Number Tested Pass Rate DNP Degree Examinees : 19 57%
2010 Certification Examination Results - First-time Takers Number Tested Pass Rate DNP Degree Examinees : 31 45%
2011 Certification Examination Results - First-time Takers Number Tested Pass Rate DNP Degree Examinees: 22 70%
2012 Certification Examination Results - First-time Takers Number Tested Pass Rate DNP Degree Examinees : 18 33%
http://www.cumc.columbia.edu/nursing/dnpcert/rates.shtml
This should absolutely frighten the general public. I'm more upset that the original author of the NYT article didn't do more research and structure a better argument than he did - he could've dunked it and instead settled for a two foot bank shot that seemed to rim out.