Oops, I did it again... that's what I mean by interpretation trumping facts.

I cross-checked my copy of "Wind and Sand" and it looks like the last
powered flight of Dec. 17, 1903 was 852' in 59 sec. So, that appears to
beat their distance record in the glider after all (622.5' in 1902 as far as
I can tell).

For that matter, all the... heavier-than-air aviation records as of the end
of 1903 appear to have been scored by the Wright Brothers... in their
glider.