From my experience, I became more upset with the 5 then I did when I had the 4S before. Yes, its lighter and a bit taller. It has LTE. But Fiddling around with it one handed or trying to text on it all the time wasn't even close to on point as it was on the 4S for me. The technology with these devices and all other Android devices no matter how many Quad Triple Core Processors there putting in aren't making that much of a difference. Im not finding the 5's camera really any better then the 4S. The biggest thing it has going for it is the LTE. The LTE is quick. But Pointless when your around Wifi 90% of your day. Plus, Im on Verizon where that's pretty strong in this whole area where I live and travel to and from. I don't play games on my phone, I don't do much data intensive stuff on my phone so the LTE isn't that big of a deal. It might have been with a 55" Android screened device, but not so much with the IPhone.
For Me, The stainless steel and glass on the 4S along with the weight and size make it a great device. I baby my electronics, I always have. Sometimes Lighter and thinner doesn't make things better. The feel and quality of the 5 wasn't a step up from the 4S in my opinion. I think it was a step down. The 5 construction reminds me of an Android. The 4S construction reminds me of a high end luxury device in my hands. The 4S for me hits that sweet spot.