The 2005 onward NC model Mazda MX-5 Miata: A test by Car and Driver magazine revealed a 0-60 mph (97 km/h) time of 6.5 s for the 2.0 L (120 cu in) U.S.-spec NC[1]
I suspect the average MX-5 owner is quite happy with the characteristics their vehicle. Hell, I consider my long wheel base turbo diesel VW T5 Transporter quite sport to drive. For a (very basic) camper van.
Also, the Miata is also widely considered a unique sports car. Sure, handling plays a role - but most people consider Camaros and Trans-Ams sports cars also. If the 3 is as nimble as the miata, it could earn a spot in the sporty list through its agility- but the original post referred to the 3's 0-60 as the reason to consider it sporty. Case in point, no one considers a CRX 'sporty.'
But 0-60 is not what defines sportiness, it's the total package including handling and driver engagement & feel.
Case in point: The Miata is one of the all time great sports cars, and it does not accelerate quickly.