Yes, there is chance that Hawass and established theory is correct, but one must transcend small items like:
Wikipedia; “Technical Director Merle Booker of the Indiana Limestone Institute of America performed a Great Pyramid feasibility study relating to the quarrying of the stone in 1978. Consisting of 33 quarries, the Institute is considered by many architects to be one of the world’s leading authorities on limestone. Using modern equipment, the study concludes: Utilizing the entire Indiana Limestone industry’s facilities as they now stand [for 33 quarries], and figuring on tripling present average production, it would take approximately 27 years to quarry, fabricate and ship the total requirements.”
To say the ancient Egyptians did all of this work with bronze, copper or even iron chisels from one, two, three or four quarry sites in twenty years time is a bit of a stretch. It would mean the ancient Egyptians were considerably more efficient than our present methods.