I just feel you could have been a hell of a lot nicer in your approach.
"I disagree with your opinion, because...."
To be honest, I too would say that the Mustang (current) is more a sporty car than a sports car.
Perhaps it's just my definition, but pin-sharp handling would be high on my list of prioroties for a sports car.
I don't think the Mustang handles badly, but I'm lead to believe that it's not the accurate device that other quickmobiles are. Par example, a VX220.
I know it's like comparing apples and butternut squash (or a Scalpel and a sledgehammer, if you prefer), but to put them both under the Sports Car banner, as you wish to do put them into direct comparison.
It's precisely the reason that I would put the Roush Mustang into the Sports car bracket, but not the Shelby GT500.
But hey, it's all relative.
And I'm out of it too.
(By the by, I don't consider the Probe a sports car either.)