A bunch of people, good people from respectable homes, set him straight, but I thought I'd throw in my 14 cents, and share it with my rabid diehard fanbase.
I would like to mention that the Leaf Volare was a professional medium format sensor that had a six megapixel sensor and a filter wheel with a rgb filter that spun and took 3 pictures. Software interpolated the 3 6mp images and sent the photographer the finished result.
These were called 18 mp images, they were crisp and could be blown up to billboard size with just a little loss of quality. I know a few photographers who didn't feel like the quality of those images were matched by a bayer array sensor until a 46 mp sensor became available.
Sigma has every right to claim 14 megapixels for the foveon X3 sensor. You should go get your camera back. Sigma should probably have provided software to help laymen enlarge their images more easily. I did a side by side test with the 5D MK II and ended up thinking I had mixed up the files they were so similar. The only difference was that the 5D MKII was more contrasty and a wee bit sharper. Tone wise, they were almost identical. I am still shocked when I go back to those files.
Any review of a Sigma camera (DP1 or 2, SD14 or 15) that includes a standardized resolution chart and side by side tests will show you that the images produced are comparable if not better in terms of resolution than those produced by micro 4/3 mirrorless cameras (haven't checked since the gH2 came out). Stop thinking in terms of megapixel. Think about sensor and pixel size and how much info they pull per pixel.
I should qualify that... I was doing something wrong! I took those pictures in RAW2, which is around 13mp :) sowwy
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