On Continous Pull and front quandrant swimming

Just a few points i picked up from Coach KK last Saturday in the pool.

He mentioned that by doing a continuous pull (AKA kayak stroke), you are actually swimming smoother as compares to doing the front quadrant swim (Start catch when recovery arm pass your ear, aka TI).

Now, by smoother, i immediately think of less splashes, calmer and maybe even stealthier. But actually, what KK meant by smoother is "constant speed" through the water. Constant speed, zero acceleration or deceleration.

And so my search of evidence if this is really true, i found this....

Below is a clip of Bill Kerby's swim (he is doing a front quadrant), with very obvious glide time. He is really, really 'smooth' and the swim really looks effortless (he IS an Olympian...)but i am only looking at his butt.



By fixing on his butt, you get a clear sense of his speed and acceleration in the water (see 1:10min on). It's clear that in every stroke, there is a deceleration and acceleration phase and if you look as closely as i did, it not difficult to notice the slowing down happens during the gliding.

Now, compare this to Scott Neyedli, (http://www.youtube.com/watch?v=ND1L8I2ZY5w&feature=relmfu), he is using the kayaking stroke. Observe his butt again, you will notice the constant speed (smooth) through the waters.

now, surely there is an obvious difference in excretion. So the question is, is there a video of a continuous stroke relax swim?