These guys don't know what they are talking about. Water itself doesn't conduct electricity (it's the impurities, though obviously present in a pool) and more importantly there isn't some magical "water breaks electronics" rule.
The trick is if the impurities in the water allowed the device to damage itself, IE if signals/electricity goes where it shouldn't be going. Sometimes this will destroy the device, sometimes it won't.
The screen comment is BS, unless it is a cheap piece of crap the screen should be sealed off to prevent against air bubbles and whatnot.
The trick is you might think your phone is dried out, but there's a good chance inside it isn't. If you have the tools and know-how (NOTE: doing so will void any warranties) take it apart to let it dry faster. Otherwise I would give it a couple more days to be safe.
Then try to turn it on, it's that simple. If it works it works, if not- these days it's probably cheaper to replace than try and get fixed.