It's really early to say, as I just got them today, but I'm wearing them right now and they're definitely comfortable, they fit really well and they give good separation of the thighs, unlike boxers.  I'll let you know how fast they dry out the next time I fall in the river.  Seriously, it's like cotton underwear won't dry out sitting in a canoe or kayak, even though I wear some fast drying Columbia shorts on top.