I believe the wheelsets do use standard hubs. The folding bike in the link had relatively low miles, under 500 if I remember (I think the actual mileage is in the thread). It appears to be a defect in the cone material that is the problem. I opened the front hub to get the measurements to preventatively replace those parts also and found the same problem. The races in the hubs arent in bad shape.
Id like to replace the cones and balls so I dont have to rebuild the wheelsets. I can rebuild them, Ive built a wheel before, but I would rather avoid the process and see how long things will last with just new cones and balls.
Later down the road if I need new hubs Ill cross that bridge when I get there.