Ommegang Hennipin is made with the same yeast they use for all their other beers. Is that not a saison?
I suppose it's all in your own interpretation and good beer is good beer nonetheless.
A) Hennepin is a tasty beer
B) If I brewed Hennepin, I don't think I'd call it a saison. I'd probably call it a spiced Belgian Blonde. I guess it's not right or wrong either way; that's just how I think of it. Beer nomenclature is a silly thing.