I´ll try to answer your question as good as poosible. I didn´t take too much pictures until now with the 11-22mm lens.
My above shared pictures are taken in RAW + JPG and the RAW files are postprocessed in LR5 (clarity, contrast, saturation, some are cropped). For the JPG I use the picturestyle Landscape and the results are very similar to my PP RAW Files.
I like very much how well the flares are controlled when the sun is in the frame or in any difficult angle to the lens. Even without a lens hood (I´m still waiting for my order).
Due to the fact that 11mm is UWA, you have to carefully compose your pictures. You shouldn´t place builduings or persons near the edge of the frame as they will be distorted in a unpleasing manner. But I guess this is part of an UWA lens. Also corner sharpness isn´t as good as center sharpness. But I can´t say if this is worse or better than any comparable UWA lens.
Unfortunately ther is no lensprofile in LR5. At least no lensprofile which came from Adobe delivered with LR or any update until know. I haven´t searched for a 3rd party lensprofile on the web yet.
The lens is very similar in weight and dimension compared to the 18-55 and so it is as well balanced with the M. The minimal focussing distance is also good. The picture of the grapes was taken from a very short distance.