@hjerry: More in line with that MikinTodo said. If they're giving Gohan credit for beating Buu, that not only excludes Super, it assumes Gohan actually got the job done in Z without dead people needing to be revived. Also it could be that this Gohan isn't aging normally: Bra refers to him like he's an equal, rather than the man old enough to be her father that he should be.