I just received this lens today and took it to the market for some testing with the D800e. Pleasantly surprised by the image quality from this consumer class zoom. No significant fringing and minor CA easily corrected in LR. Some slight distortion, but no profile available yet for this lens in LR for correction. Corners have slight softness, but acceptable for my purposes with this lens. I ran a few series of shots at varying focal lengths and all look fine with no surprises. Here are two shots (click for full size original) from the testing runs.
Market interior 21mm f/11
Market dock 18mm f/11
Here is a link to the focal length test series for the 18-35 G. Five images for each scene at 18, 21, 24, 28, and 35 mm. All on tripod, ISO 100, f/11, batch processed in LR4.4RC (no lens profile), and exported to web.