A wonderful post. I too am interested in those findings. In my opinion, church planting requires an additional set of skills to the average seminary graduate. Perhaps this is why Home Missions encourages (i.e. "requires") candidates for new church development to participate in an "Assessment Center" somewhere around North America.
Another question you may be interested in is, why aren't more pastors naturally entrepenurial? You'd think that with a commission...no...a GREAT Commission of "Going and making disciples of all nations," we would find more people willing to invest the risk in exchange for a reward of a more fulfilled commission.
Although, I suppose I, too, have my biases being a CTS M.Div grad and New Church Developer.

I have been wondering what the ratio is between churches planted in the CRC by those who have MDiv's and those who are Ministry Associates? Part of my wondering comes about because I think there is a certain entrepreneurial aspect that is required to plant a church that may not normally be an inclination of those training to be theologians. Since church planting is high risk it would likely draw a different kind of pastor than a church that is already established. In the professionalization of ministry perhaps we are training toward different competencies than are required to begin a church where there is no church. I think I read somewhere that in the world of business formal education is not a likely predictor of success in starting a business, but is a predictor of managing a business well once it is established. If that is true and if the best way to reach people with the gospel is to start new churches, perhaps we need to rethink our denominational educational priorities. I have more questions than answers at this point, but it would make for an interesting study.