Hmmm...according to my field testing, those 100K bars (with nearly the same position) are significantly faster than the Vision basebar/Profile T2+ I had on there before.
I think you might be right IF the bars were tested against each other with no arms "plopped" on top of them...but, you put some arms in close proximity to those "non-thrilling" round sections and the flow around them isn't going to be the same...and the tape might just help things by "filling the gaps" ;-)
All I know is that they were significantly cheaper than anything else that would get me the same aero gains...and "Cheapass Aero" is always a plus :-D
http://bikeblather.blogspot.com/