An inventor sent me a link to his 1.5gpm showerhead ("40 percent more efficient than the 2.5gpm showerhead!"), and he makes an important point:
The amazing thing is not how much it saves, rather the high (96%) user acceptance. People in general love the “feeling” of the high pressure shower, especially since most low flow showers have 30% to 60% complaints.Bottom Line: I'm David Zetland, and I do NOT endorse this showerhead. I do endorse innovations that serve consumers and make profits for inventors.