I hear a lot more positive test drive stories about bikes. There's a fella that I used to work with who said he regularly went out for a test on some of the new crazy stuff that came out. It probably helps arriving on a big bike fully leathered up with a matching beard.
I turned up to have a look at / test drive a gt86 when they first came out at the ripe old age of 24. They refused to let me test drive it, citing that certain people weren't in and I couldn't book one until he was back bla bla bla. I'm fairly certain they didn't want me driving it because of my age, despite the fact I'd turned up in a 350Z. Given I've since bought a GR86 it's quite likely I would have put my name down for one. but nevermind, their loss. They've since gone out of business too
My favorite test drive was in the FK8 type R. The sales guy was very excitable. around 30 years old and VERY keen to get me to buy one. We we're on a fast sweeping A-road which I know well and he kept telling me to go faster. I don't need much encouragement, but given we we're right at the top of 5th gear at one point I had to politely decline to keep my foot in it, purely for reasons of license preservation. I ended up buying one, which shows that a thrilling test drive of a great car is a great sales tactic. He phoned me up about 6 months into ownership to check that I was still enjoying the car, let me know he was leaving to be a tree-surgeon, and tell me its still the fastest he's ever been.
I have to admit, I understand why some places are a bit cagey about letting people drive performance cars. The GR86 is a perfect example as it's not super fast, but it requires a certain amount of skill to pedal it near its limits without crashing. Especially if the driver hasn't driven anything RWD before.