As previously stated, the wetness issue is a red herring. First, IF you're going through the trouble of hauling a tent on tour - for gosh sakes, bring one that doesn't leak, or drip or pool condensation on your bag. However, if you sleep under a tarp out in the open, or in a bivy bag, or just prefer tents that drip or pool condensation on your sleeping bag, then one may want to consider a sleeping bags' ability to absorb very small amounts of water and remain warm.???

I used to haul a synthetic sleeping bag and to compensate for its mass and weight, I settled on a Gertex wonder/waterproof bivy bag for short tours in summer weather. That was my preference until I spent one night sloshing around in a water filled bivy bag in a water logged sleeping bag. I decided the synthetic vs down/comfort/wetness issue was a silly discussion.