from explorers web
Maria Leijerstam, along with her support team and a car, cycled on the Leverett route into the Pole on December 26th.
Maria claims to be “the first person to cycle to the South Pole from the edge of the continent in 10 days beating all other speed records”.
Why the claim is incorrect:
This is a motorized expedition and should not be compared to man-hauling skiing expeditions.
The Leverett route is essentially a bulldozed ice road with no crevasses. Apparently she had the car carry her kit. It's no surprise that she took 10 days when she was scheduled to take 20.
I'm not saying she didn't cycle the route and she was as you point out the first but it's hardly an inspirational feat of human endeavour.
http://halfpastdone.com/2014/01/02/a-world-first-cycling-achievement-a/
Burton is classed as Assisted, Unsupported. He had no backup car but did have food, etc dropped in. He also travelled 775 miles as against her 396miles.
I find that more in the spirit of polar travel.