Tom Poore wrote:
The best bent wrist players don’t sound better than the best straight wrist players. So what’s the point? "
The point is probably the type
of sound one wants to have. Generally, the type of sound a player gets with a certain angle of attack cannot be obtained with a different angle of attack. So if somebody wants a certain type of sound to be their default, they might have no choice but bending their wrist. That does not equate to playing on the right side of nails after Presti and Lagoya, though. Usually players would just drop their wrist slightly for a more perpendicular angle of attack, and else play as usual from the left side of nails. The Presti technique involves a more complex bent (dropping wrist + suppinating forearm).
The question remains whether that contortion rewards with a type of sound that cannot be obtained otherwise. My impression is that playing from the right side of nails makes it easier to obtain a full sound with a perpendicular free stroke attack. That
may be harder to achieve with the standard left-nail-side technique, but is not impossible.
A lot of players that we thought were left-to-right side players are actually right-to-left or both.
The mere plucking direction as viewed from the front is not indicative of the Presti technique. A right-to-left swing to the plucking may be a necessary aspect of that technique, but it's not sufficient. I can play this way while still plucking the string in the standard fashion from the left side of nails. That could well be what Segovia, Chilia and Fisk are doing in the videos above.