I dont agree that slow pitch is geared towards bottom fish and fast pitch (speed jig) is geared towards aggressive pelagics at all.
In Japan, Taiwan, we use slow pitch for almost everything. Especially pelagics. I expereinced this when we jigged for tuna in Socal and Kingfish in NewZ as well. Slow pitch is the primary jigging technique for YFT, Albacore Tuna that are deep, (100+meters) . It is difficult, likely impossible, to fast pitch a 150~300g jig in heavy current all day. There is not benefit to fast pitch unless you are looking for a reaction bite, however this can be acheived with a slightly faster tempo with the slow pitch rod. Slow pitching requires less energy, its an overall lighter setup, and the action of the long fall and fluttering of the jig triggers a reaction bite,, often on the "fall" from most species.
Slow pitch rods are also more parabolic putting less stress on the angler during jigging. Fighting the fish is done primarily with the reel not the rod (when using a true slow pitch rod.) Fast pitch rods have more backbone and can stand up to higher drag pressures so fighting the fish may be easier. There are benefits to both i guess.
Anyway, there are different trains of thought on this topic. This is just based off my experience of course. Maybe for certain species, one technique works better.
cheers.
