You are correct, Axe. A good soaking on day one appears to be enough to get the seed started. At then end of the test these "no water" pots weighed about 50 grams. Well-watered pots, (near saturation) weighed about 90 grams.
I started a repeat test...only this time...I used only a teaspoon (10ml) of rain water on top of the seed, as the beginning. I weighed these pots, soil and water together--about 45 grams.
The pots watered for comparison weighed about 65 grams to start. (April 10, 2013). The test includes coated and uncoated seed. Stay tuned.