That probably sounds about right but the self voting thing will always be an issue, and is kind of a separate argument in many ways. Surely if you don't value your own work why are you expecting others to?!!
Either way it doesn't change my core view that the content creator should get a little more for his/her efforts than the person voting on their post.
I agree the 75% split was more likely to attract bloggers, but the greedy coders broke it for all of us.