I think some of those numbers are quite wrong.
This article tells something different:
http://wpsailors.com/2013/11/29/joll...trast-average/

I also have had a Galaxy S3 for one year before I get my Jolla.
And I can say the screen is much better than the S3 one.
Its brighter and has much better colors. The S3 screen looks a bit like a gray veil lies over the screen when compared directly.
On the other hand Black level are much better on S3 and there is a slightly better sharpness. But the resolution difference sounds much worse than it is. The display looks sharp and only desktop-versions of hompages with small fonts and without zooming are not as sharp as on the S3.

Kamera startup:
Those numbers are definitely wrong. Start the camera for the first time is as fast as on the S3(sometimes even better) and when camera runs in background its faster.
But there is another thing, if you go back to homescreen there is no delay on the Jolla phone, but on all Android devices an especially on the S3 there is a long delay.
So on Jolla you can switch much faster between the apps.

I have uploaded a video to show this:
http://youtu.be/EjBSkQ3xoHw