It's entirely plausible. Moscosa's job was to travel around finding out what juniors were up to. He said he was tied up till after 20 November.
Probably no appointment was ever made. And a little over a month isn't enough time to get a $600 million deal signed. Board approval would be required, and prior to that Moscosa would have needed a great deal more information. He would have had a number of exchanges with his employers.