That kind of survey is only ever done to get the name of the company who commissioned it into the news.
Here's a press release about a health concern. On a scale of 1 to 5, how much does this press release about a health concern, concern you?
1) Not at all concerned.
3) Somewhat concerned
5) Very concerned
Most people will of course, pick a response somewhere in the middle and all responses >1 can be used to describe the person as "concerned"
Then of course, there's the relevance of who they surveyed ("3000 adults" isn't exactly clear).... If it's 3000 parents of young kids (the target of Nintendo's advisory) then the result is going to be skewed more in the direction of 'concerned' than if they asked 3000 parents of teenagers.
Crappy question, crappy survey, cheap publicity... Simples!