Should you drink water immediately after eating or sometime after

I first found this suggestion in some Telugu movie.. and it stuck with me - we should drink water, 30 minutes after eating. Finally after several years, I have decided to put the issue to rest...by doing a Google search. (I am not sure why I dont consult Google earlier for all of life's questions).

From http://wiki.answers.com/Q/Should_you_drink_water_immediately_after_eating_or_sometime_after :

I have read that is best to leave the saliva get really mixed with the food we have consumed and drink water later ...apparently it helps the digestive system if we "let" saliva help with the digestion and we don't dilute it with water....I hope it helps....all the best

The above answer does not specify the time as 30 minutes, so some more Google searching is required to arrive at the exact number of minutes and seconds (hopefully it does not turn out to be hours).