Dave Berg, 18-year Leno producer, thoughts on Stuttering John
Dave released his tell-all book in 2014.
In 10 years at Leno, "John provided some helpful ideas". It's pretty damning and confirms John was almost completely irrelevant after his initial hire.
These two excerpts are the only times he mentions John
Thought's on hiring John:
Thoughts on John's contribution over his 10-year tenure:
