Odd things are happening!!
As a 4s user, I too suffered with the battery drain after going IOS7. Done all of the usual and then hardbooted and saw an immediate improvement. Never as good as was with previous IOS versions, but not losing 10% in 10 mins etc.
Noticed over the last few days, performance has gone back to previous bad levels. Eg phone on charge all night, drove to work today with phone on charge, so at 9am battery was 100%. Battery was flat by 1am and not watched videos or played music. Just the odd check on FB etc. normally phone would last all day and it would be around 15-20% by 22.00
Took my charger from iPad to charge me phone and noted within a few mins iPad was quickly loosing charge. Lost 5# within 10mins and was not being used. Never seen that on an iPad. Within the same time frame, phone had already charged 20%??
Hard booted the iPad and it went back to 100%?
Don't care what any so called experts say with all older model devices, IOS 7 has issues. If it don't, then it had inbuilt bugs to force users to upgrade. I'm not saying it's the latter, but it's one
Or the other and I still have heard nothing from Apple. This much feedback and no response, says a lot in my book.