Everyone on this planet is much more than remotely qualified to comment on whether half the people he has ever known have shown signs of suffering from significant menatal illness.
I would say it has been not even 5% in my case, and if I am off by a factor of five, which I doubt, that would only get us up to 25%.
What have your own observations been?
There is no doubt in my mind that the ludicrous figure arrived at by the study we are discussing is being rebutted by scientific specialists as we speak.
The subject is so trendy, however, that sexed-up studies like this one are bound to get the lion's share of attention. I can only hope that more rational minds eventually prevail, and that the brouhaha fades away before the compassionate liberals AND conservatives of this country decide to start shelling out a few bazillion dollars to treat conditions best left to the passage of time alone to cure.