4 1/2 years in on a Rohloff – it gets wet every ride and no probs!
I wouldn't be too concerned about Mr Barnes story, his idea of submersion is SUBMERSION literally, having a whole bike laying at the bottom of a fast running swollen river, after several attempts to ride, or see how far he can get across, which is fine if that's what he wants to do, but no bike component is designed to withstand that.
Just like if you watched a car rally, and a Subaru got totally submersed and stalled, couldn't restart and the gearbox filled with water – would you say the car was crap – I think not!
I'm just back from a weekend in the Quantocks, lost count of how many rivers and streams we went through literally.