FIRST is not a 'sport', per say, but because of the vast amounts of time and effort that most students put into their team, I do believe that it is worthy of a varsity letter.
I know that for varsity tennis, I would put in at least 6 hours per day of court time and/or training every day for months before the season began, but during the actual season, practice was barely 90 minutes, if we even had it. I worked my butt off for years (lets just say I began young) to earn those varsity letters, but still, the in-season time pales in comparison to the hours that I logged for robotics. Out of season time is a horse of a different color.
The same applies to a number of other groups at my school - most notably band. Trying to compare sheer physical output to extended committment and achievement is like comparing Apples to... well, you get the picture
