well well the race jibe well executed ( the one you call laydown) you dont loose a lot of speed hence the name
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the one i do in the above at 2:54 is very slow and with almost no wind , the lake consisting of wind tunnel/corridor( i dont how you call it in english) and there none where i do the manoeuver.
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compared to a jibe in light wind at 1:40 with the end of the wing hanging down i had to pump at the end of the turn to recover.
well executed the racing jibe is the most efficient for those condition, i think the turn radius is shorter too.