I have to admit, this sounds a lot like that 8 glasses of water a day hocum that was floating around a few years back. Somebody finds some vague correlation in an abstract and blows it way out of proportion, leading to headlines that frankly don't make much sense.
You need about two quarts of water a day, but you can get this by consuming fruits and vegetables that range from 84% (apple) to 96% (iceberg lettuce) water by weight [see link below]. Drinking eight glasses of pure water a day is ridiculous unless you consume no food at all.
I don't think there's anything ridiculous about drinking 2 quarts of water per day. I easily drink 48-144oz of pure water per day with the 48oz bottle I carry with me everywhere I go (http://store.nalgene.com/Silo-p/2178-0048.htm)
Saying it's necessary to drink that much water might be ridiculous, and perhaps that's what you meant, but I don't think there's anything ridiculous about the activity itself.
I'd also like to see some real evidence.