Correcting My Freestyle: Going from an S-Pull to an I-Pull

I'll ask again: I was under the assumption that the I-pull is a technique for sprinters. I haven't read Maglischo's book, so maybe I'm mistaking the I-pull w/ the new sprinting technique that some of the guys used in the Olympics. Maglischo doesn't advocate a different stroke for sprinters vs. distance swimmers. He claims, with scientific evidence, that a straight pull is the most efficient way to generate thrust.

I'll ask again: I was under the assumption that the I-pull is a technique for sprinters. I haven't read Maglischo's book, so maybe I'm mistaking the I-pull w/ the new sprinting technique that some of the guys used in the Olympics. Maglischo doesn't advocate a different stroke for sprinters vs. distance swimmers. He claims, with scientific evidence, that a straight pull is the most efficient way to generate thrust.