They did this on an episode of "Trucks". Half of each headlight lens was masked off to show the difference. One was polished with the Meguiars product, the other was polished with toothpaste. Results were very similar.

__________________
2004 BMW X5 3.0i - Mine
2011 BMW 328i xDrive - Hers
2002 BMW 325xi - waiting for a new owner