The really big issue is whether people have different brains. If there is a real difference to be found in the construction of brains then it should be best reflected by differences between the construction of male and female brains.
Not surprisingly, so far, the evidence is that they are largely the same, but are used in different ways.
A very interesting discusion of this (and the actual differences) can be found on LinkedIn
http://www.linkedin.com/groupItem?view=&srchtype=discussedNews&gid=852427&item=39735276&type=member&trk=EML_anet_ac_pst_ttle
It does become a bit technical because the innitiating paper argued that the differences in structures is the reason for different shopping behaviour.
