it used to be a category, but was removed along with all small tile categories.

Answering your question more thoroughly, The fastest times were 0.054 then a few in the 0.2s. But then someone experienced large amounts of lag and getting impossibly fast times in demonstration (did not submit those runs out of respect iirc) throwing the timing of the small categories into question, and i assume for reasons like this that it was removed.

Are people that desperate for some kind of achievement?

I'm glad fastest dead% is gone.