The rock grips absolutely fine in the wet, very little difference to the dry. But I did find it basically downgraded the boardwalk from something that could be fun to charge along and do the jumps etc, to something to be a little bit cautious of even with the chicken wire. But then, I see the boardwalk as mainly just a method to get to the good bits so I don’t mind that much.
The xc worldcup route works fine when wet, though I must admit I shat it off Nessie last time, after falling over trying to walk up it. The waymarked 10UTB course sucks regardless, frankly, but would suck more in the wet.
The world cup dh route rides absolutely fine in the wet- the boardwalk sections do go slimy but they’re all straight and simple.