Only have a sister so I can't compare the two. I will say from experience with my sister (and mother to a much lesser degree) that when women whine they want commiseration and NOT solutions. I think males have a tendency to analyze the problem (whatever it may be, and that includes emotional/social/relationship problems) and try to come up with what can be done. If I was whining to someone, that's certainly what I would want - advice on how to fix the problem. Women, on the other hand, by and large tend to do whatever they want anyway and want to have someone to talk to about their issues, but not propose solutions. I think even if she asks for solutions, she has one or more in mind that are already preferable to the rest and she just wants your approval, not an objective assessment.
Is this from the book: Why women cry and men lie?...or something from the same author? Of course, the main difference between men and women is: they are usually whining just looking for the comfort...so, just listen to her and don't propose the solution, unless you want fight.
Anyway, talking to a lot of people, as well looking through the history of a lot of families I know, the fact is:
Daughters are much more useful for their family in general, than sons...I heard a lot of times people whining why they have only sons, not daughters...also, sisters are very sensitive about their brothers, while opposite is very rare...you have those motives also in our traditional songs...I AM very happy for having a daughter, she is more mature, more helpful, more sensitive and more sensible than my son...who is cute and petty, but lazy, slowly, irresponsible, as coward also...my daughter is saving me...