TE probe up or down?

It's raining at the field today so here is a serious soaring question
to ponder:

Should the end of the TE probe on the fin point up or down?

Informal surveys at recent contests seem to show a slight preference
for up (not counting those "swingers" that go both ways).

I've heard all sorts of reasons why each orientation is best - angle
of attack during pull-ups, airflow in front of the tail, G-effects on
the air column, blah blah blah...

I point mine up so I don't snag it when taking off the tail dolly!

Comments?

Kirk
Wet in IL