Ed Stetzer, of the NAMB of the SBC, has an article on multi-site churches. Among other things, he says,
The multi-site argument goes something like this:
If I open a new coffee shop on your side of town, it may take years before people figure out I'm there. Even then, they may never check out my lattes because they already get their coffee at a place called Buckstops.
On the other hand, if Buckstops opens a new shop, almost immediately hundreds of people will become regulars. Why? They already know the Buckstops brand.
Many congregations are moving to a multi-site strategy for this exact reason: a church plant may take years to get a footing, but an extension site of an established church will grow immediately. Instead of starting with 20 attendees, they may start with hundreds. (When Andy Stanley started the Browns Bridge Campus of North Point, thousands showed up the first day!)
And then later ...
Perhaps my biggest concern is that the multi-site paradigm is that, without intentionality, it will limit reproduction. Let's face it-- it's easier to create another extension site than it is to create another Andy Stanley.
Worthy of thought ...