Dan Dick has spent a lot of time studying congregations of different sizes. He shares his thoughts.
The bottom line is that one size does not fit all. Many people find everything they want/need in small membership churches, while others find they prefer the mega-church setting. I maintain — based on year’s of research, thousands of surveys and hundreds of interviews — that as church membership moves from triple digits to the thousands and tens of thousands the nature of church changes, and it becomes exponentially more challenging to maintain quality of relationships, quality of engagement, and quality of ministry (even while the quality of performance, excellence of presentation, and quality of equipment and facility can actually improve). This in no way implies that high quality is in any way guaranteed by a smaller congregation. We ALL know that isn’t true.
(ht: Shane Raynor)
More of Dan’s observations here.