Believe it or not, safer than your car...
There's a weight issue that standard cash tests don't take into account.
An Aygo may be safer to crash into a brick wall than a '69 Mustang, but crash the cars into eachother, the Mustang driver will be better off, as it has twice the mass.
Aye, not to mention mine is solid steel framed, steel bodied, and all of the bits in between are just metal bolted to metal. More rigid in comparison in the Toyota which I'm going to guess has rubber mounts between components to help reduce noise and vibration, and plastic/composite parts.
Alternately, my Grand Prix has 4 star rating for front and rear impact (while I'm sure that rating doesn't transfer directly over to the UK ratings) and the Aygo has yet to be tested for those crash ratings (from my searching on carpages.co.uk anyway).
Further, what I was referring to were more the fact that America is full of Trucks and SUVs. The aygo wouldn't stand a chance should it crash into something like that- it's a safety issue, and a big one which is part of why we don't drive small cars much here.
Getting away from that though, there's no point complaining about power adders and the American obsession with big engines. Big roads and cheap gas are just part of being here. Perhaps in the large cities the little cars are fine, but you come out here where I live in the middle of nowhere and you'll find yourself in a sour mood if you've got a tiny car. Want to go shopping? You're looking at at least an hours drive (at 75-80mph) to get to a place that has stores that are common in more populated areas (for reference, we have a walmart and a kmart available to us in town- that's about all). By the time you get there, you'll want to have lots of space to bring everything you need, since you don't want to make that trip all the time, if you're in a small car that limits you. You can love them all you want, but small cars aren't practical here.