I had the old hub repacked a few weeks ago when I replaced a couple of spokes.
My spoke problems really started when my pannier was sucked into the wheel one day when I had to sprint across an intersection. (I had the wrong kind of rear rack...no extenders to the rear to handle sway).
On top of that, I weigh 270. I average 14 mph on my commute most days, except when I do intervals. I also carry books etc. in the panniers and my briefcase.
I've been commuting an average of 4 days a week for a year now.
I bought the bike used on craigslist.