Prosopagnosia[1] is a real condition that affects ≈2.5% of people. You might check out "The Man Who Mistook His Wife for a Hat" if you're interested.
Anyway, in my case it's nowhere near that bad. I can recognize faces with enough exposure, but I have problems remembering them when first seeing, as well as enumerating features, imagining the faces and comparing them between each other. I can do all of that, but it takes a lot of effort and time.