> I usually listen at 1.5x passively.

Eminem's song "Rap God" has a segment where he goes at about 6 words per second (@4m23s):

* https://www.youtube.com/watch?v=XbGs_qK2PQA

Racine sings the english translation of the Disappearance of Hatsune Miku much faster:

https://www.youtube.com/watch?v=tohDycgc-H8

However, there is a difference between a rehearsed and practiced performance and communication that makes these things more a feat of acrobatics.

For a time in the 1980s John Moschitta was well-known for making fast-talking commercials:

* FedEx: https://www.youtube.com/watch?v=NeK5ZjtpO-M

* Micro Machines: https://www.youtube.com/watch?v=Gzd11GMBONg

* https://en.wikipedia.org/wiki/John_Moschitta_Jr.

i can catch a single fastball. sometimes. i cant catch 1 per second