Liz Phair Sell-Out or Change of perspective?

While Liz Phair has some really popular ear candy available now (Rock Me) it's clear her music has taken on a very drastic change. The early Liz days included some very feminist music. Today, shes putting out toe tapping happy music about life and love. The frolicy sexual overtones are still present in her music but they seem to have taken a more positive outlook on life. Has her music sold out to more popular themes or has her perspective on life changed?