Looks like a TI Swim to me. Relaxed, looong strokes, rhythmic snap kicks, good rotation, awesome streamline. Kind of funny to hear the traditional race announcers wondering how he had it in him to do a 54 second final 100 meters. HE hadn't expended any real energy kicking yet! Once he went into a traditional race kick and increased his turnover he could finish like it was a 200 instead of a 1500. Pretty awesome testament to the TI technique, even if no one is calling it that.