Jev technical blog and early access
The end of Diogo’s launch thread links to the official technical blog and early-access entry point for further reading.
The author ran an experiment where each keypress was a separate Jev call choosing the next character out of 33 options; the result was not good.
Experiment: Forcing Jev to generate text. Every keypress here is a separate call to Jev choosing the next character out of 33 options. As one would guess - did not turn out too well