If we take out the thing about chores, homework and frustration when not being able to play (ie being utterly bored for some people)
then it's actually "at least 3 out of 8"
which is not quite impressive. I wonder what'd happen if they took out those three and then went for 5 signs out of 8. Probably 1 or 2%, which seems somewhat realistic.
Then again, I am no statistics expert, but In my oppinion you can stretch these things just the way you want to if you have some "foresight" in the matter.