For whom they do not know it, El País  is one of the most important newspapers of Spain. In its blog an interesting post has been published, brings over of the problem that occupies us. It's in spanish, of course .... but it's not difificult of translating  to the english (if someone wants it, it is possible to do an attempt). You can read in http://blogs.elpais.com/mujeres/2011/02/los-hombres-son-de-wikipedia-y-las-mujeres-de-facebook.html hasta luego. Marcos (aka Marctaltor)