Greater spans and reduced twist allow better performance in general. The drawback to lower twist or rigidly held twist is that spins are more likely. It is a fact that rigid wings spin more readily than a flex wing. The lower angle of attack at a wing's tip helps prevent it from stalling in a turn, which is the normal cause of a spin. Flex wings allow their twist to increase on the inside wing as a turn is initiated.
All rigid wings can spin.
Inadvertent spins are entered by turning with low to medium bank angles at slow speeds, then either slowing further, encountering turbulence or making an abrupt roll control. Two hundred feet or more can be lost quickly before recovery. The recovery itself may overstress the wing if the pilot does not exercise extreme caution. The fact that rigid wing hang gliders are used frequently to soar close to a ridge or hill and thermal in light or turbulent conditions make them potentially vulnerable to spins since slow flight and shallow turns are required for success. The possibility of overstressing and breaking a rigid wing in flight is of greater concern than with a flex wing since the latter is more elastic and relieves its load as the G forces increase.