“Despite enthusiasm for the concept, open peer review was not widely popular, either among authors or by scientists invited to comment.”
It’s too bad, as a lot of people, myself included, had high hopes for this experiment.
The conclusion, from the article:
“Despite the significant interest in the trial, only a small proportion of authors opted to participate. There was a significant level of expressed interest in open peer review among those authors who opted to post their manuscripts openly and who responded after the event, in contrast to the views of the editors. A small majority of those authors who did participate received comments, but typically very few, despite significant web traffic. Most comments were not technically substantive. Feedback suggests that there is a marked reluctance among researchers to offer open comments.
Nature and its publishers will continue to explore participative uses of the web. But for now at least, we will not implement open peer review.”