I saw at the world cup that Gatorade is the official energy drink. Are the players actually drinking Gatorade? I would have assumed that they would drink a specialised drink, such as one from Science in Sport or High5 -- for individual sports, I would even expect that they would even mix their own (possibly in conjunction with, or with advice from, a brand such as SiS). I see tennis players often having the SiS gels, and I know (or at least am pretty sure!) that cyclists use energy drinks from brands such as SiS.
I never thought of Gatorade or Powerade as a drink for professionals; not as extreme as Lucozade Sport, but not serious enough for professionals. Was(/am) I mistaken?
(If you can think of a better tag, then please tag away!)