HHS hasn't won a state championship in 100 years. Literally.
Having 1 banner year really isn't being battle tested.
Have they had an outstanding year? Yes, of course. Nobody argues that. Vance and his kid have done a great job. And that can happen for any team once in a blue moon. The stars align, people stay healthy, you've got a great run in the regular season and good matchups in a playoff bracket and everything goes right. That's what is happening for them this year. And props to them.
But if you want to talk about year in & year out battle tested, that title will absolutely go to Grenada.
Not saying Grenada will pound Hattiesburg in Hattiesburg. But, saying Hattiesburg is "without a doubt" ready to beat Grenada would a stretch for me.