I dobut that chart.
The CONSISTANT statistic is for people who are riding for less than six months AND have no motorcycle license (ie no training course)
You also have to figure this article is garbage because in taking the course YOU START WITH A CRUISER. Most learning bikes are little cruising types. Few start out with their desired bike.
I think progressive is doing what they always do, they are lying.
That said, throwing a leg over any one of the latest crop of litre sized sport bikes is not for the faint-hearted; they reward sloppiness and indiscretion with copious amounts of pain. My Buell Lightning, an also-ran compared to GSX’rs, ‘Busas, and ZX12’s, is stomach-turining eyeball-flattening hellaciously fast. An errant whack of the throttle will get you into trouble in a hurry; a super-sized panic grab of the front brake lever only compounds the trouble you're getting into.
The enticement to crank it up is there in spades. A deft touch is required to pull back from the brink of disaster; not an easy feat when your line is spreading out towards the guardrail or gravel shoulder . . .