Yeah, we've become a society of whiny wussies.
She should have done things a little different. First, is contact her lawyer and begin documenting, and should have been documenting every interaction between the bullies and her son, and every interaction between her and school administration after each bully interaction. School is not doing it's job, sue them.
Second, the very first day that this kid got bullied, was to teach him how to stand up for himself. Either go to some sort of self defense training center and begin getting the little pup prepared, or, teach him to end the confrontation as quickly and violently as possible with first strike to knees, nuts, or throat.
There is only one way to deal with bullies, and it's to kick the ever lasting crap out of them and teach them a lesson they won't forget, and as a parent, I don't care what any school does after the fact.