A couple more hints about the Mann email disclosures by way of an article in Science Insider:
In a press release this afternoon, ATI said it had received "a 4.3 megabyte disk that contains 3,827 pages" of data. Paul Chesser, ATI's executive director, said ATI staff members had not had a chance to review the contents. "We think we got a third" of the documents requested, Chesser said. Mann, who says the university is keeping him abreast of the documents it releases, says they consist of routine e-mail messages and similar "boilerplate."
Apparently more documents will be released next month.