What's even worse is that Apple don't seem to moderate their forums. People come here for "help" and get bashed by a 12 year old keyboard hero for "not comprehending his infinite wisdom". I'm a technician, specialising in electronic repairs, I've been in this field for almost 20 years now and know more than enough about electronics to know when there's an issue. The only reason I'm posting this is in the hope that someone from Apple actually does read this and care enough to look into it.
iPhone 5 - 6 Months old:
I know that on my iPhone 5 I get the following issues since the update to ios7. These issues either occurred immediately after the update or randomly with in a very short time of the update:
I) 3rd party cables stopped working. In my case it would very seldom give the "Device not supported" messages, instead it simply doesn't detect the cable at all. This happened immediately after the ios7 update as I had the 3rd party cable connected during the update.
II) The original "Lightning Cable" very randomly does not work (8 in 10 times it works fine). Turning the phone off with the cable connected to power will cause the phone to turn itself back on and the cable works fine. Also connecting the cable while the phone is turned off causes the phone to turn itself on and the cable works fine. If the cable does not work one can disconnect and reconnect the cable a hundred times, the iPhone will not detect it until restarted.
III) As Ado_16 pointed out the slide function is problematic and sometimes I do struggle to get the phone answered. Luckily this doesn't happen too often, but then again it never happened in ios6.
IV) While on ios6 the iPhone crashed once in a 5 month period. I always used to comment on just how stable this phone's OS is. While on ios7 it has crashed at least 5 - 7 times in the last month since I updated to ios7. Seeing the Apple logo on the background has now become a regular annoyance.