[JasonB]

Hello Kevan,
It is the modern "curt" way. I believe it stems from web forums like this one and of course Social Media. I see this kind of communication in the workplace also where emails tend to start "Leo ..." rather than "Hello Leo" and my pet pet hate is when someone sends a message to two people and starts off "Both ..."

Yours sincerely, A Dinosaur.

Pistols at dawn sir, if you think this particular forum has encouraged any such behaviour.  

Yours sincerely, a fellow dinosaur.