We cannot make conclusions from studies about sprinters. Stretching has several effects. And the results also depend on the intensity, timing, and duration of the stretching. Excessive stretching may induce muscle soreness, render them less efficient, deplete oxygen stores, and induce state similar to muscle fatigue. On the other hand, warming muscles up, gently stretching them, increasing the blood flow well before the performance, may help replenishing the oxygen stores, and reducing muscle tension, hence helping to better relaxation.
I think the final result depends on the way you do the warm up, and when you do it. It is well possible that no stretching or no muscle warm-up is better, but I think it would be premature to tell it directly without making intensive and objective testing. Perhaps it would be a good idea for a thesis work - someone in another thread asked for some topics, so this one may be indeed interesting.