AnandTech's Klug has a similar response to the 5S performance. "[P]laying around with a few games and especially Apple Maps with 3D buildings manages to feel even faster," he says. "I'd say in Maps with flyovers especially the 5S feels amazingly fast and doesn't hitch or stutter at all."
The new camera flash system, which now has two different color temperature flashes which juggled to balance the color temperature of the scene being photographed "looks to be a substantial improvement," according to Klug.
"This thing is way speedy, presumably because of the jump to 64-bit," says Jordon Crook at TechCrunch. "We only poked around the OS a little, but everything we saw was buttery smooth."
Apple seems to have created a fingerprint sensor that is highly accurate and very simple to use. "In our initial tests, the fingerprint detection works almost shockingly well," Crook says. "Setup takes seconds, and it worked consistently and instantly thereafter. After configuring a 5s to be on the look out for Darrell's fingerprint, Greg's fingerprint was immediately turned away. Once I added mine to the system, it worked immediately. There was literally zero frustration."
IDG News Service's Williams says, "I've used fingerprint sensors on phones and PCs before and the experience was bad enough that I always switched them off."
"On the iPhone 5S, it's very easy. In fact, the toughest part was registration, which requires users to repeatedly press their finger on the home button, so the software can scan and gain enough data about the fingerprint," he explains. "It took about 15 seconds to accomplish. Once done, opening apps was easy. With the phone locked, it literally took just a touch to unlock and jump to the home screen....Unlike my previous frustrating experiences, the fingerprint lock should make it faster and easier to get into your home screen while keeping it secure from others."
The Verge's Dieter Bohn added a couple of observations about the new home button. "[I]t's now made of sapphire so that it can act as a reliable fingerprint reader," he writes. "It's not nearly as concave as previous models— in fact, it's almost flat. Luckily, it still maintains a nice, tactile feel when you click on it and we don't foresee anybody running into any issues."
Bohn wasn't able to stress test the new camera, but he did see improvements. "If Apple's claims about improved [camera] processing and larger-sized pixels on its sensor pan out, the iPhone 5s, like its predecessor, will have the best smartphone camera for the average user on the market," Bohn writes.
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