Have read that as well, but have seen more happy reviews than the other way 'round.
I figure the wet weather traction of the Nitto Recon Grappler, like many other tires, is dependent on inflation pressure. Remember, many owners don't geek as hard as we might on their tires' Cold Inflation Pressures. They'll just set pressures to what's on the driver door jamb (always a good decision, yes, when the lack of case-specific info is lacking) which in our case is 60 psi front / 75 psi rear?
Let's roll on bricks! baby, whereas 40 psi Cold Inflation Pressure nets a completely different traction level.