I have a simpler answer: NO.
"Email is for old people. Mobile is for action." ~ DoSomething
95% of what you want to meet for can be easily handled in a 5-minute email exchange.
Quora's Growth Hack: Emails Done Right
7 networking tips from the most successful super connectors, by Ilya Pozin - The Next Web
How to Go From Working 60 Hours a Week to 40 By Sending 2 Emails a Week