Was comparing mono to Mares quatros with 11.6sec/25m result.... thats 2.15m/sec, so compared to 2.66 with mono makes 50 cm difference for every second, and thats roughly 20% difference in speed.

My math is correct.

Freedivenz best result is 8 sec/25 meters, thats 3.1 meters/second. And if I compare that to best uwh player speeds of "a slice under 10 sec", thats still 50 cm ahead over best players arround. Now, best finnswimmers results over 25 meters are 7-7.5 seconds, and best uwh results with bi-fins are 9.5-10, that again makes even much more than 50 cm/sec... 90 cm/sec at both best times...BUAAAAAHHH!!!!!!!
Definetly a huge difference in speeds, but with lots of practical aplications unknowns...

Now, for a normal player makes 12 sec a lenght, and if another does 14, thats still only 2 sec difference, but makes only for 30 cm difference in distance per second....!

@freedivenz, please do me a favor and test it with mono&puck, and test quattros&puck as well..... and the consern about full uwh gear dragging a swimmer down, can be countered with using special streamlined mask(technisub has one model) and special uwh cap that I'm in the process of designing. Still there would be some extra drag, if nothing else the puck,stick and glove would make one.