Very interesting results, imo they prove that high MP but cheap cameras wont work well. The 8MP Canon outperforms the 10MP Casio, so megapixels is not the only factor we must take into consideration: we need an optimum of both amount and quality of megapixels.
although 98% OCR success is superb, what if you postprocess the images with a software? do you reach a 100%? does postprocessing increase the OCR success in both scans and photos?
I am sure your work will be referenced from all those who try to digitize using a camera, and maybe in the futures scanners will extinct for home/small-office digitization