In reply to Andy Moles:
Andy, I wasn't trying to get all anal over the wording of the original post, I just interpreted it as if you go winter climbing you're instantly doing something more adventurous. I agree that winter climbing, inherently, is more adventurous before you've even left the house, just ask all those climbers who have written off their vehicles just trying to get to the hills (that includes myself btw, my trusty Volvo V70 while doing 35mph en route to Rois-bheinn one early December morning)!
All those things that make winter winter are mandatory, you have no choice the moment you decide to climb at that time of year. What I was trying to get at was how adventurous is the actual climbing compared to summer, or to put it another/better(?) way, how adventurous are people's decisions in comparison to those made in summer? I'm not sure they are any different or at least not markedly so. But, as someone has already pointed out, it's all conjecture, I'm not sure there's a definitive way of knowing.
Someone also mentioned alpine/expedition climbing. I know it's a bit off topic but for years I used to think the Bonington era was way out there in terms of "adventure" climbing, and that seemed to be backed up in part by the number of fatalities that plagued that time. But these days I'm not so sure. Then again, climbers back then were tackling mountains like The Ogre, the Latoks and Gasherbrum IV while only being able to rock climb in the low E grades, compared to the likes of David Lama, the Huber brothers etc these days.
Interesting thread btw