By looking at it for the past 15 minutes or so since it has been released, the Math Division seems to be the least competitive as far as major teams. The Science and Arts divisions should be verrrrrryyy interesting this year. Many world class robots in those divisions. Not saying that there aren’t any in the other divisions!! Everyone here is a world class robot. I just seem to recognize some of the more well known teams in those divisions I mentioned.](http://www.roboticseducation.org/documents/2015/04/2015-world-championship-math-division-team-list.pdf)
According to the data posted on this spreadsheet (links to post), the Math division is the least competitive, and then continuing from least to most: Math, Arts, Engineering, Science, Technology.
However, rebuilding, bad days, technical issues, shipping damage, practicing, and testing will cause many teams to either greatly improve or get worse, and so the season data might not be able to predict what will actually happen.
I think we all look forward to seeing the best 450 teams of the world!