"Yeah, I guess it could be called siping, but it's on the recessed part of tread, not on the tread blocks that directly touch the ground. It has plenty of siping on the shoulders but I can't recall ever seeing a tire with it on the recessed part of a tire."

OK, I see what you're talking about now. Yer right, that's not siping. I can't really understand any benefits for it other than the fact that it makes the tire LOOK more agressive.