If you read what I said before you will see that this is exactly how it is working right now.
Again:
This event is triggered when you hit “Publish†button, when you post on your site from email, when you publish post from your iOS/Android Device, when external plugin correctly published new post, and when scheduled post becomes live.
The button called “Publish†only if you immediately publish the post, if you scheduled the post for the future date the buttons is called “Schedule”
