From the website (emphasis added for my own clarity):
The God-o-Meter (pronounced Gah-DOM-meter) scientifically measures factors such as rate of God-talk, effectiveness—saying God wants a capital gains tax cut doesn't guarantee a high rating—and other top-secret criteria. Click a candidate's head to get his or her latest God-o-Meter reading and blog post. And check back often. With so much happening on the campaign trail, God-o-Meter is constantly recalibrating!