lots of ***gorty in this thread,
FWD cars can be sports cars by social standards, not described otherwise by enthusiasts. As the term sports cars is an umbrella term that can encompass many types of sporty vehicles.
In your world of sport compact cars, an ideal sports car should have Neutral steering. RWD cars on the spectrum tend to come closer to this idealism than FWD or AWD. However just because your either one of the drivetrains doesnt mean you belong in a specific spectrum of Understeer/Neutralsteer/oversteer.
In terms of performance, its best to judge the worth of the cars sportyness based on balance and power to weight ratio.
In terms of aesthetics, its anyones ball game based on the designer and company direction.
For example lets take a look at the new Mazda Shinari, some might say this is a sports car, but wait..is it? The clear answer is no, this is a Luxury Sedan with elagant styling cues from its designer. Its P:W ratio is not bad, however its balance is substantially offset by the sheer size and location of larger masses within its structure.
Lets take a look at a coupe version of the shinari. By shortening the wheel track and bringing the car closer together, we eliminate much of the balance issues from the larger 4 door. To favor a more centralized weight distribution. This should bump up the P:W even if the engines power output is the same.
Sport compacts, sports cars, super cars, hyper cars all have their own direction towards performance and place in the universe. Yet they are all sports cars in some fashion (not exuding FWD cars). Lets not muddy up the definitions based on feelings or driving experience.