Seems implausible given the incredibly precise dimensions of each block - dragging them through wet sand would remove a significant amount of surface area..."The accuracy of the pyramid's workmanship is such that the four sides of the base have an average error of only 58 millimetres in length".http://en.wikipedia.org/wiki/Great_Pyramid_of_Giza#History_a...

Sorry but humans dragging a block of stone through wet sand is going to have almost zero impact on its surface area, especially over the short distances described in the article. The forces needed to significantly erode the stone would be huge, and are inconceivable given the low friction between the block and the wet sand.

Not that it matters, because the article is about dragging the blocks through wet sand on sleds - did you even read that?

58 millimeters is quite a lot. Besides, it's totally reasonable to think that the stones were rough-hewn at the quarry, then refined at the construction site.