Ahh, don't believe any *load limits* some rep quoted a bike shop, because in real life it doesn't matter. US parts reps know very little about these hubs.... it's quite likely they have never even road a bike with the hub they are talking about for more than 3 blocks.
In Europe 250lb riders get years of use out of internal hubs. People make crazy freight hauling bikes with internal hubs. Both SRAM and Nexis hubs are very tough-- they are street proven for millions of miles in Asia and Europe.
But don't take my word for this.... email some bike shop in Holland. They will get a good laugh out of it.