I general, don't value large churches, but I have learned that come in different forms. I have been humbled by friends/acquaintances who work in large churches that really are having an impact in their community. 

I think we can easily make the size of a church and idol (be it wanting to have a big or a small church). There are churches of both sizes that aren't being what they should be. I think the important issue is focusing on the quality of our Christian communities. When size trumps quality we begin to veer off track.