Well, first off, we know that, for the first time, Bolt did NOT do that in 2008!
He ran the 100m and then prepared for 200m (Short-to-Long at the very least in the SPP Phase and probably in the GPP as well as his starts were massively improved right from his very first 100.) and it worked rather better than before I’d say.
As for Asafa, to me the time doesn’t mean very much at all because any sprinter remotely close to his 100, 200 performances could rattle off a time like that. It’s a matter of pace distribution.
I saw the film from last year and Asafa went out WAY too fast, so I really don’t have any idea if this is better or not. We need to see the race itself.
Just to put it in perspective, I used to argue with Desai Williams about more emphasis on the max speed portion of his races while he preferred an emphasis on the SE portion, an area where he was already better than he needed to be.
In 1984 (then PBs 10.17, 20.29), Desai opened up with a “300” in Provo Utah. He took the outside lane of a 400 race to help the other guys get a qualifying performance. After finishing the 300 far in front in the low 33s and slowing right down, people started shouting to keep going. He reaccelerated, which is really tough, and still ran 45.90s. This, however, was no indication of a 9.70s 100m.