>That is correct. The sharpness of a photo is significantly >increased using an >EFCS. It is a >great pity that Nikon does not adopt an EFCS, especially in >bodies optimised for high resolution.
First, the EFCS 'sharpness' advantage is often seen in circumstances when you would be using a DSLR on a tripid with MLU anyway thus negating it. Further, if one haunts the Sony forums on reputable web sites you will find many users started testing this when the A77/99 were released with photo evidence establishing a minor advantage in some shots, but no difference at all in the vast majority of shooting situations. I mean they didn't magnify things to preposterous sizes that no one would ever see, but it was good enough for the human eye.
Second, there are disadvantages in shutter sync speeds and ghosting when shooting moving subjects at large apertures with an EFCS.
In conclusion, some possible advantages, some possible disadvantages - opinions vary.