I guess size is a relative thing... my Toyota Avalon is a mid-size car, but measures nearly identical to the Model S (just 3" slimmer, and 2" taller, same length). It's turning radius was/is great, as we had to pull into a drive way, and back up and turn around during our test drive due to traffic issues and road construction. It handled extremely well at low speeds and in tight spaces... and we had nearly a half hour driving the car. I was pleased.
But like it's been said here already... everyone has their tastes and certain expectations that must be met in their cars.
I'm hoping that I'll have another chance or two to drive the car, before my production time comes due. Hopefully to drive it a night, for one.
Looking at the Avalon specs on the toyota site, it lists the width as 72.8", length 197.6", and curb weight as 3572 lbs. An extra 4.5" of width and 1100 lbs is a big difference in my opinion. How does your Avalon move around with 4 250 pound occupants and 2 big suitcases. Just a wee bit more mass I'd say.