Long before you go for the test drive you're aware of how big the car is, if it has the features you want, mpg etc and if it will do what you need. I have never test drove a car knowing it wouldn't be suitable from the get go.
Some cars looks big, but only when you drive them you feel how nimble they are, and as for the official MPG’s, they are are far from reality, same as with battery life… and with the security cables attached to the phones, I can’t even hold them properly (“test drive” in the shop) in my hand before buying them…