I love both Amerie and Tweet's debuts.
TBH, those debuts, along with Teedra's, are better than almost any and all of the albums released that decade. Or since.
What's striking is that female R&B was in full force... BUT most of these albums didn't make much of a presence in pop culture. They didn't really have true "eras" beyond a hit single or two on the R&B charts. Unless you were a dedicated fan of music, you hardly heard any of those albums in full.
The one exception is Ashanti.
Even though R&B was slaying quality-wise, it was hardly producing hits or multi-platinum albums like it did in the nineties.