I think most people get sick on this ride due to inner ear issues. Yes, my dh gets a headache if he rides it more than once. But dd, 11, and I ride it several times in a row and have had no issues with it. There are many warnings about not riding with particular health issues..neck/back problems, heart issues, pregnancy, motion sickness. And no, I am not saying that anyone ignored those warnings and made a bad judgement call! There are plenty of undiagnosed health issues out there that might be exacerbated by riding this attraction. An awful way to find out about an issue though.
I don't think that 6 people taken to a hospital over a period of 8 months is a huge deal. We know only that the 'survey' ended last year. It could have been at the soft opening, before they readjusted things. Add a person or two after that, with normal issues and you're up to the 6. We were there in Aug '03 when it 'officially' opened and there didn't seem to be people in obvious distress after riding.
It is the type of ride that you just can't judge how you will be affected, until you ride it. Unless you already know that you can't handle g-force and spinning rides put together. My heart goes out to that poor family. How incredibly awful to have such a thing happen, at anytime, let alone on vacation. But lets not get in an uproar about whether or not this attraction should be shut down until we find out exactly what this poor child died from.