I know mine weren't reported when I went to school, because I didn't even know I had them - my Grandmother bought one or two a year for me and all my cousins starting when we were born until she passed away. I didn't receive them until she passed away a couple of years ago - I had no idea they existed, but if the Financial Aid department had done a search by my SSN they would have found them and since they were equal to a year's tuition this certainly was not done.
Plus, some bonds have penalties if they are cashed before a certain number of months/years have passed (i.e., I Bonds). I'm reasonably sure they wouldn't count this kind, how fair would it be to count money where you're not going to have that much if you cash them in.