I'm mixed on this. On one hand, if girls like it, then what's the problem? As someone that wanted Legos as a child, I rarely got any. Mainly because they were all 'boy' themed and my parents and grandparents couldn't get past that. I did have a few - the kitchen set, a space one and a fire station, but not nearly what I would have liked. I would say that the sets now are so overly aimed at boys with boy characters (even in the non-licensed sets), that there are few that appeal to a wide range of girls. These may be the 'gateway drug' to get many more girls interested in Legos.
OTOH, I don't like the general 'must pinkify' part - they could have made most of these with regular lego colors, even the lighter shades of what is out, and appealed to all kids, but the pastels are a bit overdone and I know my boys will reject them as 'too girly'.
Mama to three boys ('03, '05, '07)