Crossbow rates of fire held to be under estimated; in a demonstration a crossbowmen fired 8 bolts in the time that longbowman took to shoot 12 arrows.
Can I ask for more information regarding this demonstration? Thats an extremely high rate of fire for crossbows when most speak of (and demonstrate) a rate of fire between three and five if not lower.
I suspect a team with two crossbows, one man loading while the other aims and fires could put up that sort of rate of fire, but one man loading, aiming and firing in under eight seconds seems more or less impossible given the technology at the time. If you do have two people teams, you have to consider two archers could be firing twenty four arrows in the same time period. Archers also take up less space, so you could fit more of them into a "line" if you were seeking to emulate musketry tactics.