Forgive me for pointing this out but you are not on a web log here. This is a forum. Also, you are not the first poster to open up this subject. There will be discussion whether you like it or not.
The bottom line is that slap is a technique used by musicians, NOT a style of music in itself. Having said that, it seems that there are quite a few that think that way.
I admire your tenacity on the subject. I have a feeling that you have an axe to grind however. I don't know where that comes from and really, I don't need to. I wish you all the best on your quest, whatever it is.