Jason:
I have to disagree that power tossups are an entirely equal
measurement across sectionals. Although they are certainly 2nd only
to bonus conversion, unlike bonus conversion, one's power tossup
ratio will be effected by the quality of one's opponents to some
extents. Not only does one's aggressiveness on the buzzer change
when playing better or worse opponents (thus conceivably affecting
one's powers) but playing very good opponents may well lower one's
powers (though increased aggressiveness may raise the total) due to
their powering the question before you (I would guess that powers
are not randomly distributed but rather tend to clump on tossups
where the editors inaccurately assessed the difficulty of the given
tossup). For one example demonstrating the unreliability of powers
as a complete measurement (though for most purposes they're
certainly reliable), I recall playing solo in an NAQT regional a
couple years ago and putting up 40 powers through sheer
aggressiveness...and only managing to win 2 games.