A dozen new Facebook friends in three days

If you didn't know any better, you'd think I was just at a high school reunion or something...

Speaking of which, of the 165 friends I currently have on Facebook, I have the following count:

• High school classmates, spouses of classmates or teachers: 60
• Undergraduate classmates, spouses of classmates or teachers: 4
• Graduate classmates, spouses of classmates or teachers: 0

Does anybody else out there have a similar disparity? If so, what does it say about the interpersonal bonds we make in high school relative to the bonds we make in college?