I am happy to report that I passed the ABO Advanced exam during Opticon in Las Vegas this year. I surprised myself by passing because I did it on a whim and it was a couple of decades ago that I passed the ABO. During Opticon, I took the prep track for the test which finished on a Thursday, and then on Friday I registered and took the test at the testing site. The woman told me the results would be emailed to me a few weeks after I completed the test. You can imagine my surprise when "Passed" popped up in the screen after I submitted my answers. It made my day especially since I was unsure of how I did.

Does anyone know the statistics for the passing of the ABO-AC test?

I wish I didn't have to wait 3 years to submit the articles in order to obtain my Masters. I think that will be the route I choose when the time comes.