There are many research/treatment centers. Concussion has become an money making industry in the past 10 years. Most are competing for patient and research dollars.

U of Pittsburg Medical Center has been successful with getting their name out because they sell the ImPACT System and hold seminars about using it. Their protocol is driven by neuro psych protocols (Micky Collins is a PhD, not an M.D.)

John Leddy, M.D. at the University of Buffalo has his research and ideas.

There are two research and treatment centers in Boston. Robert Cantu M.D. is affiliated with one. He is very knowledgeable but has his own biases.

The 2012 International Summit on Concussion in Zurich used the committee approach to develop protocols.

Even though they all have some overlap, most have a specific focus that may make their protocol different. The more popular ones are focused on return to play, not return to job and family life. Here is an interesting web site that shows a variety of protocols. Sportsconcussion – Concussion Management

There is a big difference between deep research and what makes it to the public. Most researchers are not good at developing a market to sell a protocol to like UPMC.

There is also a big difference between diagnosing and tracking concussion symptoms and treating them. Not every symptom is treatable even though some claim to treat them all. In some cases, there is a risk of over-treatment. The patient is kept so busy with therapies, their brain never gets time to rest and heal. There is often a 'nail and hammer' syndrome at play. If you are holding a hammer and see a nail that appears out of place, you hit it. Not every vestibular symptom needs vestibular therapy. Not every cognitive or memory struggle needs speech therapy.

There are still lots of questions and few solid answers.