Yes, we're skeptical, too. But it's worth a try if you don't have the equipment or power to till a field to turn it into pasture.
|Jason and his hand-cranked seed spreader|
The idea behind frost seeding is to let the ground do the tilling work for you: as it freezes, there are cracks in the soil where seeds (the smaller the better) can get through... as it thaws, the seed gets worked into the soil, safe from birds and with plenty of water to help it germinate. A few days of this freeze/thaw cycle is best to make sure the majority of your seeds have been worked in. And that's it. Then you wait for spring to see if it comes up.
So... we wait.