What is your reaction to the Reveal Study?

The recent Reveal Study, from Willow Creek, has drawn negative press for Willow and the Seeker Sensitive movement. Reveal was a study they did on their own effectiveness. To their surprise they weren't being as effective as they thought - Greg Hawkins shares some of their findings in this video. Willow feels they were misrepresented in articles and blog posts from Christianity Today (here, here and here) - so they created a response video, which you can see below:

If you've watched the Greg Hawkins video, there is kind-of a feeling of repentance, that something is really wrong - the tone of the video, cinematography, music, Greg's passion - it gives that sense. But if you read the actual study, it's not the same feeling. So it makes sense that Willow would be misunderstood.

What's your reaction to the Reveal Study? What would a study of your congregation reveal about your church's effectiveness?