Pretty well. On that particular day I had about 30-35 lbs. on the front. When I'm just using two bags I like to put them on the front instead of the rear. I've found it's much smoother and more stable. I'm sure it has to do with the lower center of gravity and the fact that the bags are centered on the axle. The bike's still pretty nimble with them there. When they're on the rear; they're higher, centered a bit behind the axle and subject to pedaling forces transmitted through the chainstays. There's more shimmy at the front with no weight to stabilize it.

This is more pronounced on the DC than on my dedicated touring bike. The DC has shorter chainstays, a shorter wheelbase and the tubing is less robust. Of course, the DC is lighter and quicker for those reasons.