Based on reading the test thread, I'd say that any magician who depends on spontaneous magic to do anything useful is a moron.
I've been trying to follow the test thread, but there's still so much of it that I just can't understand. I feel it's stuff that we should understand, too. Like the mechanics of storing power in items. Or loren's cryptic comment about using a book to mask the fact that he was the one casting spells. Maybe I just need to sit down and re-read the rules again, because stuff like that just totally confuses me.