Most definitely, I have had 2 iPhone 5's, I bought one simfree on release day and used it for a month, it just felt too delicate, I often fall asleep listening to music and didn't dare with the 5, it is just too long and thin (and I have seen a few with cracked screens from external pressure) so I kept my 4S as an iPod.
Within a month the 5 had picked up a few scratches to the anodising even though I had babied the phone, even to the extent of carrying it in a pouch. I cut my losses and sold it and went back to my 4S.
In January I was offered another 5 as a free upgrade so thought I would try again with a different colour, no joy, again the same feeling of fragility and a fear of scratching the anodising put me off after 3 weeks (as well as some anger against EE who were being difficult about unlocking) so I sold that one as well.
My 12 month old 4s is still immaculate and I use it without a case, I carry it in my pockets, and as I said quite often fall asleep with the phone. It takes all the use (abuse?
) and keeps going in a totally pristine condition. I've decided to keep it until the iPhone 6 arrives and is hopefully a more robust phone, I've even paid for an extra year of AppleCare so it's under warranty for another 11 months.