It's interesting- I asked about the lights only because of what I thought was a weird aberration in the original Kate leg textures, particularly the inside of her left knee. But it turns out that it's not a bug- it's a feature. The texture appears to have a bruised knee!
I threw together just a face to face comparison of the "stock" textures for Cara and Kate using the Click N Render IBL Set, preset #6.
The textures are pretty good close up. There are some nice touches, such as the translucency through the ears, and I think you get a lot of mileage from the bump and normal maps, especially with the Kate model.