Just one note, Marty; the "top split" does not refer to the driver ability to race clean, it refers to the hotlap time. The abilities are more reflected in the licence level. So if you look at a race at 'A' or 'Pro' level, you'll see cleaner races even in lower splits than, say, at 'C' level, or heaven forbid, the starter (E? F?) level. The bottom licence categories are there to sort out the riff-raff, really. C is where it starts to become cleaner IIRC.
(I think V8s were in C, but my memory is quite rusty. iRacing is one bottomless money pit I'm trying to forget, hehe)
But hey, carnage you can get even IRL so...