Monotone empathy voice.
Also has nothing to do with the water. Watch him on tv, he gets nervous, starts talking too fast and starts stumbling on words. Puni is probably right that it's too much memorization, but he looks like his heart is about to beat out of his chest. He's just not comfortable speaking in public.
One on one interviews don't seem to stress him as much.
You don't have to go off the deep end when people offer observations on him. It wasn't an attack on his character, good grief ksuw.