The Ancient Geek
I dunno. Slow is slow, regardless of STOL, piston, turbine or even a 747 (although, I'd rather be in a 747 during a gusty XW).
Generally, there is always going to be a headwind component, so even adding a bit of speed for the gusts won't be a factor for landing distance. In the Twin Otter during a gusty crosswind I would use F20 instead of full flaps. Reverse, flaps up, braking as required depending on the surface still resulted in a fairly short rollout even with less flap. Engine responsiveness (or lack thereof) never seemed to be an issue.
I suppose if you're 'on the edge' with really bad gusts there would be a problem, but the reality is a shorter landing distance with more headwind component. Limits exist with any airplane.