The new Panasonic 14-42mm X pancake zoom has been reviewed at ePhotozine (Click here): “If you value compactness above all but must have a zoom standard lens or you want ultra-smooth zooming movies from your CSC, you have (literally) no other choice than this one and I would therefore have to recommend it“. ePhotozine also said the optical performance is not better than the standard 14-42mm lens. But considering the increidble tiny size of the X lens this is sounds like a very good news.
Also the korean website Popco (Click here) tested the same lens. But there is no google english translation available. You can still look at their charts and image samples.