Something piqued my interest, so I did a quick analysis with the data from the
Blue Alliance.
In 2009 10 / 12 division winners attended more than 1 regional.
In 2008 10 / 12 division winners attended more than 1 regional.
In 2007 11 / 12 division winners attended more than 1 regional.
In 2006 7 / 12 division winners attended more than 1 regional.
That means in the past four years only 10 teams attended only one regional and made it to Einstein (of the 48 teams that made it to Einstein.)
Only 2 teams (296, 971) in the last four years have attended only one regional and gone on to win a Championship (of the 12 that have won in the past four years.)
I won't editorialize.
-John