If you follow the NPR article linked in the article, you'll see that Lego clearly did their homework before embarking on this new line. In light of this, I think it's odd for them to be accused of reinforcing stereotypes when their research showed that this is how (most) girls like to play.
I do think it's sad that we now have 'boy-lego' and 'girl-lego', but (for the moment), that appears to be appropriate for the world we live in. Maybe some of those girls will want to do more than just play with handbrushes and handbags and check out the Technics or Mindstorms. Who knows.
NPR article: http://www.npr.org/2011/12/15/143724644/ith-new-toys-lego-ho...
LEGO product lines: http://www.lego.com/en-us/products/default.aspx