It's a reasonable hybrid with a 32 hole shimano Nexxus hub, double wall aluminum rims and generic 14ga stainless spokes. There's nothing wrong with that. And it should be capable of holding a 300lb'er.

What hasn't been answered, is whether he took the bike in for an already broken spoke. If that was the case, chances are that all the spokes will have fatigued and fail in subsequent order. But, there's absolutley no reason why that hub and/or rim wouldn't provide adequate service with some brand name spokes laced in and tensioned to the maxiumum allowable tension for the rim.

I quite successfully ride 32 and 36 hole wheels with both 14ga straight and 14/15ga double butted spokes from 300-250lbs.