An anonymous reader writes "Ever sit there waiting for an email response and wonder what's going on? Did they get it? Did it get filtered? A study looks at the responding habits of a large group of corporate users. They find, among other things, that users would try to 'project a responsiveness image. For example, sending a short reply if a complete reply might take longer than usual, intentionally delaying a reply to make themselves seem busy, or planning out timing strategies for email with read receipts.' Tit-for-tat, 'Users would try to reciprocate email behaviors -- responding quickly to people who responded quickly to them, and lowering their responsiveness to people who responded slowly to them in the past.'"