Well you're getting that data from Steam users. They're more likely to have gaming capable PCs.
Sure, that's true, and without knowing how many people playing blockland also use steam we couldn't really come up with any sort of error (and I'm assuming "I bet it's most" isn't good enough for you).
In the real world,
intel cards are the most popular, probably due to the fact that business computers and laptops use them. Of course, that's not representative of Blockland users either, who are probably closer to Steam in terms of system setups.
In any case, it's not just intel cards. Somebody with an AMD processor had problems too, and I assume that means they've got one of the mobile ati graphics chipsets as well. Also, as far as I know, nobody's tested it on a dedicated intel card yet. I think this issue is possibly limited to integrated cards although I'm not so sure.
