GSMarena review of the LG optimus G is up and it looks very promising!
http://www.gsmarena.com/lg_optimus_g-review-835.php
Although they say this about the audio:
with some of the cleanest output we have seen
However, you look at the figures etc. the one S has the better/cleaner audio than it
Although it is very close, so doesn't matter too much unless you're an audiophile
Camera seems good, but the S/X and GS 3 still seem to be better.
Screen sounds great as well.
LG uses a screen technology called Zerogap touch - basically a laminated screen so there's no air between the screen layers (which causes glare) and it uses in-cell touch technology. The top layer is Gorilla glass for protection. At the end of the day, the screen isn't the least reflective we've seen, but it's comparable to that of an iPhone 4/4S, so it does well enough in direct sunlight.
The viewing angles are good thanks to the IPS+ tech, but not without some color shift and contrast loss.
When we put the LG Optimus G side by side with the Galaxy S III and Optimus 4X HD it was clear that the Optimus 4X HD is inferior but the Optimus G has quite decent contrast for a non-AMOLED unit and actually has more accurate color rendering than the over-saturated AMOLED screen on the Galaxy S III. Overall, the image quality is nothing short of impressive.
Regarding performance:
The powerful S4 Pro chipset will make sure that you get as smooth a smartphone ride as you can possibly find. We are not just talking benchmark scores and bragging rights here - the LG Optimus G really moves around at the speed of your thought.
Battery life according to their test is very good, however, once again don't pay much attention to it as the S has the best battery life apart from the MAXX, note II etc. however, their test shows that the one X has great and better battery life than it, but as we all know it is pretty poor
Will be interesting to see how the battery, camera, performance and audio performs with stock android.
Why couldn't the LG nexus look just like the optimus G!
EDIT:
Got to say the LG software looks pretty good, although awful colour scheme
It actually looks very similar to touchwiz . Noticed a bit of lag in some places, suspect this will be gone with JB though........
Also, that lockscreen and screen turning off animation is awesome!