I think there’s been a phenomenon lately that the 400m is the sole indication of condition for any event you run just about. While I would definitley hope that my 100/200 guys can run a decent 400m if I asked it of them, I don’t think it would be an indication of what kind of shape there in as far as it relates to the 100m.
I’m as happy as the next guy that Asafa ran this fast, but I think too many people ignore the injuries he’s had in the past and no one seems to connect the dots as far as his “shape” goes.