I think the A500 is quicker than people think. On paper the 0-60 time is 7.9 and the BHP is 135, but as you well know, that was probably tested in scientific conditions on a new car. A few owners have reported figures of 140 to 161 BHP standard, which you can believe if you want to. I've personally timed 0-60 several times with an accurate stopwatch (and a mate who didn't believe the 0-60 time) and it ranges between 6.8 and 7.4, i would say an average of 7.2 from a non SS A500. OK so it's not that quick, but it's nippy up to 100 and last week i raced an Aston Martin DB9 in the wet, and over the 9 mile journey i lost him 2 or 3 times (i was in front!) He passed me when i turned off later on and gave a flash of lights and a power surge of throttle!
I've also had a 350Z follow me out of a junction and copy me when i floored it, however he constantly stayed at least 3 car lengths behind me and didn't catch up.
I think the type of roads you drive makes a huge difference, I've never driven the A500 on a motorway for example, 95% of my driving is tight twisty narrow roads over the hills and far away where the A500 is best suited. But the GPA is probably a lot better on bigger roads over long distances etc. So i haven't really come to a conclusion have i