In the Dragonslist Newsletter (April) there was an article about drinking during training. Now, the author recommended drinking sportsdrinks. His argument was that you should drink sportsdrinks, because water makes you stop drinking before you have enough.
So, if you look at this at the cell level, what happens is this (in a very basic and abreviated form): Your cells all contain water and salts. A cell seeks to keep the same water to salt ratio as the others at all times. The thing is, water is lost for various purposes (i.e. sweating), so the concentration of salt may become imbalanced, the cells send a signal to your brain, you are thirsty. Now, if you drink sportsdrinks, you take in water plus sugar, which has the same effect as salt: it draws water. Therefore, you will need to drink more as if you drink plain water. Up to this point, the author would probably agree with my reasoning. But I say that it is not necessarily a good thing to introduce sugar into the system to slow down the process of compensating inside the cells, but it is preferable to drink water, as this will not mess with the salt/sugar side of the equation, contary to what the author stated. I believe sportsdrinks are fine if you need a quick energy burst, but otherwise, water is preferable.
What are your opinions on this? Is my logic flawed somewhere? Or is this really a question of wether a nutritionist works for Coca Cola or Evian?

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