Actually Kyenge and another female minister (Boldrini) have had plenty to say on her colour and race (the former) and on being a women in politics (the latter). 

Whilst Kyenge says Italy is not a racist or a sexist country in general, she has often talked about the difficulty of being a woman in parliament specifically in Italy and has commented repetitively about her want to be called 'black' rather than 'coloured'.

If you are bringing this up because you feel that Gillard used her sex as an excuse, perhaps you should review how often Gillard mentioned the fact of her sex in public. Aside from the mysogyny speech and a small reference to her sex in her defeat speech I think you will find it was always OTHERS that brought it up as an issue continuously.