Fuji X20: low noise & high resolution

According to the slide in this post on Mirrorless Rumors, Fuji X20 has better Signal to Noise (S/N) ratio than the old 12 MP sensor used in 4/3 and m4/3 cameras, and even out-resolve 1" 20 MP sensor. The only camera with such sensor I am aware of is Sony RX100. Now I am really curious to see a review of Fuji X20. Well, RX100 JPEGs undergo heavy correction - price for very compact body, while X-Trans sensor does not require anti-aliasing filter. Also, Fujifilm did some woodoo magic with diffraction in their latest cameras, X20 and X100S. As for old 12 MP 4/3 sensor... My Olympus E-30 is noisy. The slide also has 1.5" 12 MP sensor. Canon used 1.5" sensor in PowerShot G1 X but it is 14 MP sensor. A bit of confusion here.