I wouldnt be worried. Not sure why they are jumping strait to diabetes. Sugar and salt both cause cells to lose water and make you thirsty. Unless you are becoming ridiculously thirsty and peeing a ton more, you shouldn't be concerned.

I think people who aren't getting thirsty just aren't noticing it in the same way that you notice it with salt. I think its probably because salt has a stronger effect on your mouth feel, which can make you feel thirsty, even before the salt really effects the water levels in your cells.. also we are much more accustom to eating sugar in ways that also include liquid, like soda and juice, where as salty liquids are pretty much only with soup broth or something.

But salt and sugar both have nearly the same effect on the water within cells, which is what will truly make your body thirsty, past the feeling of a salty mouth that needs to be quenched.