For world class runners, what should the conversion be? The women's times from the WC were about 4 seconds apart, and fairly equivalent performances historically (not sure how legit the 400m WR is, but that would make the difference more than 4.5 seconds). Since women's hurdles are shorter relative to the height difference of most men and women, meaning the flat/hurdles differential should be even bigger for the men, wouldn't that suggest an equivalent for 46.x guys like Warholm and Benjamin to sub-43 - or at least more conservatively, sub-44 putting them among medal contenders?