Sorry for the lack of clarity, and thanks for the feedback. By traditional I was thinking of more evenly paced runs that seem to deliver relatively superior times at longer sprint distances than perhaps negative or positive splitting might. There would certainly be occasion to ask athletes to use any of these depending on the intent of the session, but what I guess I was looking for was whether or not there was a preference in these special endurance test runs of 180m-300m (depending on the level of the athlete) for running the first half of these runs in an aggressive enough manner as to make even splits impossible (which I believe Powell does anyway in the video uploaded).
I actually looked at both of his 9.72sec runs last night and it is very hard to find significant differences between them. He is obviously in great shape and running with tremendous confidence in both. I just remain curious about how he loses smoothness over the final 20m of his race, particularly as this is an area that both Bolt and Gay don’t seem to struggle at all, or show any breakdown in form. It would seem to be an area for focus or inquiry if he is seeing relatively greater sector losses here compared to his rivals (if the data suggest that what I am seeing visually actually has any impact on sector times).
I recognized the coaching references you mentioned as being south of the Equator (confirmed easily by Google). Always nice to have access to good minds when you are learning.