Shorter is always better. Stregnth to weight is defiitely on the side of the shorter rider and shorter riders are more aero (or at least they can suck wheels better).
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Il faut de l'audace, encore de l'audace, toujours de l'audace
1980 3Rensho-- 1975 Raleigh Sprite 3spd
1990s Raleigh M20 MTB--2007 Windsor Hour (track)
1988 Ducati 750 F1