It seems like I see kids greet each other with hugs quite a bit these days. Unless it was a boyfriend-girlfriend thing, you never did this when I was younger. The students are protesting that two seconds is too short for "friendly" hugs.
I have never been a real big hugger but have gotten a little more so in recent years. All in all, I think hugging is good and is not the same as "making out" which really would not be appropriate for school grounds. Two seconds seems awfully short for a friendship hug. I wonder if all the teachers have to carry stopwatches now or if they have official "hug monitors" posted around the school.