That is not that much if you are dedicated to the idea of Bitcoin and make a point of investing a lot into them. I would not be surprised if a lot of Bitcoin die hards are also into StartUp culture and programming/building stuff.

I am actually surprised there are so few people who posted on the poll with 100+ Bitcoin.

I sometimes invest on Just-Dice and plenty of people have thousands of Bitcoin to throw around, a lot of these people are developers with a passion.