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Don't worry about the delay! It's the weekend!
I do not have iCloud Photo Library enabled. I don't believe I ever did. I don't even use iCloud storage as I have almost 100% available.
I'm pretty certain the full resolution photos are on my iPhone, as the same photos are on my iPad via Photo Stream in full resolution, and the only place they came from is the iPhone.
And perhaps the best test of all: if I browse my phone via USB connection to my PC in Windows Explorer, I can see all my photos in full size (2+MB size), so I'm certain they are there.
I'm having this issue with iPhone 5S to Windows 7 PC, but not with iPad to Windows 7 PC, for the same photos. To explain: If I take a photo on my iPhone 5S and transfer to my PC it is very low resolution, under 200K. If I transfer the exact same photo from my iPad (out of the Photo Stream library), I get the full resolution. I'm running iOS version 8.1.2 right now.
Customer support service by UserEcho
Hi Enrique.
These photos have not been edited. I'm running 8.1.2 on the phone.
I'll install the 8.1.3 and let you know if anything changes.
Doug