I went to Good Friday at my SSPX chapel and I was surprised at how packed it was - there had to be over 100 people there. The young lady sitting in front of me had sleeves that were only a maybe 3 inches long - well above the elbow, and I saw maybe 5 or 6 other ladies with the same sleeves. All the other ladies I saw were either at or below the elbow or has long sleeves. All wore nice dresses.
Although I don't remember ever having paid attention to such a thing until this thread, I would vote for women should wear long sleeves. I don't really think that short sleeves should affect men one way or another - but I could definitely be wrong about that - but either way I would say that long sleeves represented a certain air of feminine holiness or chasteness (not sure how to describe it) that was lacking, or somehow just not the same with the short sleeved ladies.