On iOS 10 the home button was closing apps instantly which felt way more natural to me. I have it on my iPad and each press is instant. It feels as if the device is closing the app simultaneously as I complete my button press. This is how it is on almost any Android phone as well. Its truly bizarre what Apple has done here. It’s also costing it in real world speed tests. If you disable the animations on Android, it would be a brutal steam roll of the iPhone 8 because not only does it take a second to respond, there is also another animation to complete anything.
There is speed and then there is responsiveness. The Note 8 is on paper a much capable device than the One Plus 5 but when you use a One Plus 5 there is a snappy feeling to it which radiates speed even though the Note 8 is easily faster. That’s thanks to the reduced animations and instant response time.
I feel the iPhone X swipe will be faster than any home button implementation including any on Android. Because the app closing animation happens in tandem with your finger. With the home button implementation the system still waits for your finger to complete pressing the button.
IPhone X will have to wait to see if you're trying to enter multitasking (swipe up and pause)or just let your finger linger a little too long while trying to go home (swipe up). Or there will be a lot of frustrated people. A swipe is clearly slower than a button press in any case (moving a finger a mm vs several cm)