sanxiyn comments on Human-level Full-Press Diplomacy (some bare facts).

[sanxiyn]

Yes. From page 34 of Supplementary Materials:

In practice, we observe that expert players tend to be very active in communicating, whereas those less experienced miss many opportunities to send messages to coordinate: the top 5% rated players sent almost 2.5 times as many messages per turn as the average in the WebDiplomacy dataset.