It matters if you work outside in the summer months like I do. I can't physically hydrate fast enough some days. So I end up a little worse each day of the week. Something that hydrates better starts to sound pretty good. For 99% of people? Just drink water.
Edit: I just read the article and milk is (one of) the answer(s). I tell my coworkers every year during heat illness training that if I go down and they give me milk I'm coming up swinging.