On 2023-10-29, user “xranksoon” achieved a 40-line sprint time of 13.423 seconds:

However, on reviewing their replay, it was obvious that this run was cheated. They had used a bot to play, which generated movements easily distinguishable from a human. xranksoon was promptly banned from the game.

Will another such cheated run appear before someone achieves sub 14 legitimately?

As with my other market, a time of exactly 14.000 seconds will be included. Only 40-line sprint, not 20L or 100L. Market will resolve based on expert consensus.