Probably not the first or last, but an insight/researchy conclusion gleaned from the PIT Journal project: knowing how to conduct peer reviews does not come naturally or easily for readers. The first few days after closing the submission process a good deal of activity has gone toward strengthening the ability to review.
A message sent to participants, handouts, and a video all speak to the conclusion that the population of PIT participants and the process of developing the submissions benefit from support for developing reviews.
One of those obvious conclusions, surely, but of note nonetheless.