I've been UPC. I've been United Methodist. And now am Alliance.
And I'm here to tell you that the same thing is true in all of them. AND in most other organized churches.
I'm also very involved in a Christian retreat organization called "The Walk to Emmaus"
http://www.upperroom.org/emmaus/default.asp It's the same thing in this.
All of them are very predominately white groups.
I find this to be unfortunate because my experience is that we (as a white culture) have much that we can learn from our AA brothers and sisters and they have equally as much that they can learn from us. Besides which, if we can't fellowship with one another here, how in the world do we think we are going to make the adjustment to fellowshipping together once we get to heaven!!!
The question is: HOW do we make this happen??? That is the million dollar question. I wish I knew the answer.