> It's a common thing but not 40-60 age group.
Where are you pulling these stats from? Do you have any references or do you just keep misrepresenting your personal observations as facts?
I sure do see my 40-60 age group friends and acquaintances going for more diet soda than regular soda. So I find it hard to believe that diet soda is not a common thing in the 40-60 age group.
It is frustrating that for someone who posted strong criticism against a research paper, you keep making bold claims without presenting any references or evidence!