Bingo! Oh yeah, WHTA never was considered Rhythmic, but their sister station in Baltimore, WERQ "92Q Jams", was until 2006.
However, I don't know how on earth KBXX Houston still gets away with being tagged a "Rhythmic" because they never were in the "borderline league" like WPGC, KMEL, or KKBT. They clear made a pendulum switch from being a pure Rhythmic that played pop, hip-hop, and R&B songs to one that just play practically all hip-hop all the time which is MAINSTREAM URBAN (just like WHHH Indianapolis, WHHT St. Louis, and the other Radio One Mainstream Urbans with the exception of WKYS and WERQ).