As you and I have noticed as well, that it is hard to find a dedictaed, honest to god, turly committed new submissive. How many submissives have we talked to and they turned out to be...well...flaky? I am also leery of those who proclaim themselves being "experienced" for we have run into countless people who say they have all this experience but certainly don't show it.
I agree though, you don't have to be tained to be dominant, though if you are going to practice dominance of another induvidual, expect them to give over control of themselves to you, then they should know a little more than the desire to do so. I would be hesitant to subitt to a new dominant.