Very interesting results.
I agree with livinglegend that personal motivation is a huge factor. But when I see the incredibly low pass rates of many of the unaccredited and CBE schools it makes me think that they are simply admitting too many people who should not be in law school. A significant number of unaccredited schools had zero first time passers, and that's after the FYLSE has weeded out quite a few. I don't know if the problem is with students, the program, or both but having consistently low pass rates indicates a problem.
I also think it's interesting that many lower ranked CA schools have significantly better pass rates than much higher ranked out of state schools. For example, La Verne beat schools like Boston College, Minnesota, and Notre Dame. Golden Gate beat American, ASU, and many others. Southwestern beat Vanderbilt!
I don't accept that this is necessarily due to the advantage of being able to study CA law. When I was in law school in CA I think I took one CA specific class (community property). All of the other CA law I learned in BARBRI along with the out of staters. Considering how difficult the CA bar exam is, I think it's pretty impressive that a school can take students with lower GPA/LSAT numbers and still beat top ranked schools on the bar exam. Maybe the well known difficulty of the CA bar makes the CA schools strive harder? I dunno, but it's interesting.