Quantity and Quality
Those who support the Whitehead seem to believe that the volume of reprinted rewritten stories which appeared during 1901 about Whitehead flying somehow proves the case.
You might just as well say Lydia Pinkham's Vegetable Compound for the relief of female ailments was a true cure-all since her ads were in almost every issue of every newspaper printed in the US during the last quarter of the 19th century.
In the matter of WIlbur and Orville Wright vs Whitehead, it is also the quality of the evidence that matters. The Wrights produced a stack of contemporaneous diaries, notes and photos documenting every step of their progress - and what did Whitehead do ? He scribbled in aeronautical books that he had stolen from the Buffalo Public Library in 1897... he gave extensive self-promotional quotes to newspaper reporters... he made totally unsubstantiated and for the time patently absurd claims and excuses (such as a circling flight some 7 miles over Long Island Sound in winter) and that his machines couldn't be photographed in flight because they were too speedy, and that he had gone some 4-1/2 miles in a glider in the 1890's...
If this sort of historical novel is your area of interest then Ms. Brinchman's book will be a satisfying read. If, however, you prefer fact to fiction and reality to myth, try Tom Crouch's "The Bishop's Boys."