Some interesting numbers from LifeWay via the Christian post.

According to the study, 53 percent of church switchers attended
traditional style worship. Of that, only 29 percent switched to
churches that hold traditional services. The most popular worship
styles among church switchers are blended worship (38 percent) and and
attend a contemporary worship (33 percent).

Bring on the Chris Tomlin, huh?  More…

Nearly half (46 percent) of those who switch churches move to a larger
church, the study also found. Meanwhile, 29 percent switch to a smaller
church and 25 percent choose a church the same size as their former
church.

Hmmm.  Moving towards the bigger and the smaller.  Another number…

84 percent contribute financially compared to 69 percent at
their previous church; and 64 percent choose to volunteer compared to
51 percent previously.

Wow!  That would seem to shoot conventional wisdom in the face when it says people just want to be consumers when the jump from church to church.  They seem to be more likely to give their money and time!

Source: http://www.christianpost.com/article/20070405/26715_Most_Church_Switchers_Choose_Non-Traditional_Worship.htm