I would think the center of Lutheran Gravity is now Kenya/Ethiopia - so all US sems are pretty far
Say Tanzania/Ethiopia, and you're probably closer. The Lutheran church in Kenya is still pretty small -- lots more Anglicans, Roman Catholics and independent churches.
Scott - yeah - thanks for the correction - I was reading something about the Global Anglicans prior to posting this. What they have seen happen in both countries is also amazing. One statistic I was reading put the growth of the church in Africa from 8 million to close to 400 million since the 90's. Even if that was a century of work, rather than 2 decades - it would be amazing.
In both cases, Anglican and Lutheran - the centers of the movement is no longer Europe and North America. It will be interesting to see how the church's culture is transformed over this time.