They are as close to the horses mouth as you can get. They are a group of aeromedical specialists who's business is helping with FAA medical certification problems. They are ALPA's aeromedical consultants and run VFS to help non airline types as well.
For a very nominal fee they'll give you a staight answer to the question. If help getting a medical back is needed, they're also the go-to guys to make it happen.
Have a friend who lost a nut in training earlier this year. He was out for about 3 months, but got his med back quick and finished training. Don't know if he got a 1st back though, but atleast a 2nd quick. Says it got to be the size of a tennis ball almost...damn aint dat a b!tch.