For what it's worth, I contacted Newegg.com about the 27ea83, regarding the updated firmware, this was their response as to whether their stock has the new firmware (1.25) or not...
...not very helpful at all.
I don't think anyone who has bought a retail unit can confirm or not if it has the new firmware. We don't even know if it's on production units... It might have just been special review units. A unit from retail needs a proper review, ideally from the same 2 sites that got to review the 'special versions'.
I've already moved on, got a U2713HM for $550 shipped. ~1/2 the price, and it can last me a few years until OLED is cheap