Either you have a faulty 4S or you're just weird; the 4S is still widely held as having one of the best screens on the market.
Either way, have fun with OLED's whites!
And have fun with LCD blacks "dark greys". I find it odd that you pushed color reproduction as the most important aspect of a screen just a few posts ago, then when Nibs says bad blacks ruin a screen for him, you scream hyperbole. I suppose cherry picking an aspect or two and calling on it being the absolute hamstring of screen tech is fine when you do it, but if someone else does it, they aren't being reasonable or have a faulty device, cmon now.
EDIT: Urgh at LCD blacks.
Terrible, and the sad thing is the OneX has one of the best black levels of LCD's on the market period right now:
It just gets progressively worse for other phones from there. And the OneX blacks are still greyish. Scust.