I was originally diagnosed with mild TS, never givin a full diagnosis (and the nuerologist was one of the top in the country at the time) but (sorry for the tone of this phrase), it didnt take a genius to see I was "different". What I have learned is that mild or not, to me it is still a diagnosis.
You said your sone was diagnosised with a "tic disorder". Like admin asked, does this occur daily? How sever on average are each of his tics?
I know I can go in small periods where most or all of my tics are small and not severe and than simetimes they can become complex and occur more often. I also have been off my meds for about a year now due to I was starting to become "immune" to their effect( I took them for 14+ years, and that can happen) and I decided that I was gonna try to do it with out meds and see what happens. I know its a good feeling to have a "final" answer and than move on but if these tics are happening quiet frequently, whether its TS or not, taking action to help resolve the issue would be best.
The other day at a local grocery store, I saw a rack with books on it and one of them said, "pregancy for dummies"............