You can take a picture of people with a 5S and it won't always be blurred. However, if it had a Xenon flash it would be less likely to take a blurred picture and would also be able to take photos that you could not take with an LED flash.

Most photos I've seen people try and take with an iPhone 5S are blurred.

Like most people on Earth, I know quite a few people who have iPhones including a few who jizzed themselves to a frenzy until they got the 5S. Some are adamant that the camera on their phone is every bit as good as the 1020, even better for some...although, just to balance the argument, a few concede that the camera is ok at best but their phone is otherwise much better (fair enough).

What amazes me the most is that some of the people who think the iPhone camera is the mutts nuts go on to post some absolutely dreadful photos on Twatter and Instagram. Some then try to polish the turdy photos using filters, effects and some ghastly hdr experiments that resemble nothing in the known universe.

I tried. Once. Never again. Whilst I got some great shots, lugging around a DSLR completely ruined the night. The 808 is way more convenient.