Re: BJJ Purple Belt Exam
Currently, I only teach BJJ. The aikido I've trained in has significantly affected the way I grapple to create a very smooth and flowing style.
I think Aikido and BJJ are perfect compliments to each other. One teaches you how to move and redirect energies in a vertical plane, the other covers the horizontal.
I do not believe BJJ is any more efficient than Aikido, but I do think the randori training method they employ gives BJJ some real teeth in actual application.
The thing that impressed me the most about BJJ was that smaller men could consistently beat larger and less skilled men in a reproducible fashion. Not just talking about it. Not assuming you can. Not relying on anecdotes about someone who could. They just did it. I wanted to be able to do that as well, and I'm passing that skillset on to others.