" The most valuable form of communication is face-to-face. The next most valuable is by phone or videoconference, but with a caveat: Those technologies become less effective as more people participate in the call or conference. The least valuable forms of communication are e-mail and texting. "

― , HBR's 10 Must Reads on Teams (with featured article “The Discipline of Teams,” by Jon R. Katzenbach and Douglas K. Smith)