Scott McKnight on the Emerging Church - Epistemology and Ecclesiology

I recently read Scott McKnight's article "Future or Fad: A Look at the Emerging Church Movement."  I think I've said this before, but in case I haven't I'll say again that Scott is the one to read if you want to get some of the best thoughts on the emerging movement.

This article is probably as good of a summary of the emerging movement as you will find in a short space - it's only 4 pages long.  I can't say it eased my qualms about the emerging group, but it is a good short overview which, if it doesn't motivate you to be more sympathetic to the movement, should at least help you to avoid caricatures.

There are several points of note which I would like to interact with and if I have time to do so I may.  For now, I'll just point out one comment that seems to me to be crucial in understanding the emerging church.  In response to D. A. Carson's criticisms of emerging epistemology, Scott says:

Instead of epistemology, the EM is concerned with ecclesiology—how to “do church” (to use this commonplace but inelegant phrase) in our current context.

My only question in response to this is "how do they know they should be more concerned with ecclesiology than epistemology?"