I have listened to the Marian McPartland and Paul Bley Piano Jazz programme; I can honestly say that I heard nothing whatsoever that would support the negative connotations I have read here about it.
The two pianists got along together just fine throughout, both in their discussions and in their duetting. I heard nothing untoward that might have given even a hint that there was any kind of animosity from either one of them.
The thought struck me that something might have been edited out; but if you listen until the end I’m sure you will concur that it just couldn’t have happened.
Both of them played very well together and obviously enjoyed doing so; most of the tracks were duets, and I enjoyed the programme as much as I enjoy listening to any other of the Piano Jazz series.
As far as I’m concerned, the allegation is a myth and totally without foundation.