I just found this while verifying my email with Tumblr.
The simplicity of the message just shocked me, in a good way. I kept on thinking that is usually to deliver messages directly, in short phrases, to be direct, to the point, and do not confuse the user.
However, using short phrases usually may arise to ambiguities and users confused.
So... is there any study, measurement o approach to this? Which is usually more desired, short phrases or long phrases?