[EricH]

Just to prove a point here...

Teams NOT from North America tend to land in a few categories...
--Europe (maybe half a dozen)
--Israel (See the list for the Israel Regional--about 50-60)
--Australia (See similar list--only fewer)
--South America (about another dozen)
--China (Not sure offhand, but give-or-take 30 as a guess)

So that's 150 or so teams that aren't from North America. You might sneak it up to 200 by adding Hawaii.

That leaves about 3000 teams from North America.

The VAST MAJORITY of FRC teams (by a factor of a lot) are from North America. If CD is anything like representative of the rest of FRC, the results are going to be overwhelmingly skewed towards North America.