I concur. I've seen people try to add sugar to unsweet tea, and it always involved lots of stirring and leftover grit. Also, I misread your post. I thought you were asking how there's a difference between hot and cold tea WRT getting sugar in there. Now I see that you were referring to putting the sugar in hot tea. In that regard, there's probably not a huge difference, aside from the sheer volume of sugar sweet-tea drinkers put in our tea.