In reply to Webster:
> there is physiological reason why there are less top female winter climbers in comparison to summer. Particularly (but not exclusively) steep ice requires a certain amount of upper body strength that no amount of technique and experience can get around. im not only on about pull up and grip strength, but also the strength to wield heavy axes above your head repeatedly whilst swinging them into the ice. and this engages muscle groups which are often under developed in climbers (shoulders, triceps etc). it is simple physiological fact that on average men have higher base line upper body strength than women.
But all that applies to situations like steep bouldering, too, and there's plenty of women doing well at that. And wouldn't the typical greater strength of men be countered by the typical lesser weight of women?
> I suppose the lack of female role models in winter may have a sociological limiting factor on female participation…
I think this might be quite significant - although I know there's a good number of female winter climbers doing hard routes, the only ones I can think of off the top of my head are Fiona Murray and Innes Papert* . Which is my failing for not paying attention, combined with the fact that less attention is drawn to them.
Or, and perhaps this is pertinent, they draw less attention to themselves. And maybe male winter climbers are particularly susceptible to the lure of the First Ascent - I'd have to defer to someone much more knowledgeable to suggest winter routes in Scotland put up by parties that contained at least one woman (again, this is my own failing, rather than a criticism of female winter climbers)
*Edit: Just remembered Catherine Destivelle as well
Post edited at 11:57