I wouldn't class myself as an old duffer at 53 but i guess that's really for someone else to judge!
Having said that I don't drive my Jazz particularly fast as i dont feel any need too, I own 3 motorcycles which more than satisfy my need for speed and to be honest most cars for me seam boring to drive.
The reason for me getting a Jazz was reliability first and foremost, my other half has a 2007 1.4 Jazz and we have never had a problem with it, she had a Civic before that and again nothing ever went wrong with it, until recently i have always had company vehicles so when it came to me getting a car there was only one choice really.
So dont imagine all Jazz drivers dont know what it's like to go fast or do 0_60 in 2.5 seconds, we may well be doing that on a sunny Sunday somewhere, it's just in my case it will be on 2 wheels not 4!