While true, but in a seedless bracket I would expect Freeman to have the bracket advantage so even with the boost of mindless bracket makers I don't see Phoenix breaking or getting anywhere near 70% like you are suggesting.
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BOP Results: http://www.freewebs.com/charmander6000/Rivalry%20BOP.xls
BOP Topic: http://www.gamefaqs.com/boards/8-gamefaqs-contests/60566352