I had read long ago about Dasani and Aquafina just being purified muni water. Didn't know where from though. I can honestly taste a difference between those and, say, Zephyrhills/Dannon/Calistoga/Etc. Tap water here in Miami...well it has a distinct taste, and not necessarily a good one. I remember the same being true back in the Bay area, though NorCal can advise if this still is the case.
All in all...gotta agree with Doc...to each his own as such tastes are truly subjective. But I do always still get a kick out of people buying Dasani and Aquafina, somehow thinking they are getting pure water, freshly dripped from a glacier.
Speaking of which...I just remembered a commercial on t.v....think it was for 7-Up....had the dude out in the wilds, next to a spring and a bear comes along and basically takes a dump in the spring, with the guy then asking how sure "you" are about your "pure" spring water... :laugh: