I don't think it was intended to be a slam either. I think what he was trying to say was that if companies are going to sponsor a race car they expect return on investment - we all know and understand that. I'm sure KK is looking for a pretty hefty sum of money, sooo...
IHRA, because of it's shorter schedule, limited venues & limited TV coverage isn't going to guarantee the kind of ROI a company would necessarily want.
NHRA, however, with it's longer schedule, races North, South, East & West, and expanded TV coverage on ESPN2 (Higher Visibility) vs. Speed Channel might make it a little easier to sell to a prospective sponsor.
I don't think that's a slam against IHRA, merely good business practice. He's simply trying to improve his position in an attempt to gain sponsorship for Clay.