Ken Presner posted the following on his site in regards to your post:
"The Ultimate Zapper's single low frequency produces the fastest results of any zapper. An informal zapper study on the curezone.com health forum with The Ultimate Zapper, ParaZapper, Super Deluxe and Gamma Zapper shows 1 hour with The Ultimate Zapper = 4 hours with ParaZapper. The maker of ParaZapper graciously conceded The Ultimate Zapper "may be the most powerful single frequency zapper" available."
He failed to mention that the ParaZapper used was an outdated version of the cheapest model made by ParaZapper. It is to be expected that his $169.00 model would be a little more effective than one that sold for $58.00 or so.
He also failed to mention that it was a 1 person study.
I am not surprised that he still keeps the reference to Dr. Lloyd even though Dr. Lloyd has discounted this statement himself.