For 100m sprinters 5'9" and under, based on a lot of research and calculations I've done, the top speed per 100m is usually around .88 of the finish time (ie, if they run 10.0, the fastest 10m interval will usually be .88s, or 8.8s if theoretically extended to a full 100m). .88 of 12.9 is 11.35, and with Mo's "strength" or "endurance" (man, I dislike those terms in this context), it's not surprising to me that Salazar has stated that Mo has run a flying 100m in, surprise, surprise, 11.3 (http://sportsillustrated.cnn.com/vault/article/magazine/MAG1195163/2/index.htm).