umbraco/Umbraco4Docs — pull request #168 by kipusoep (2014-12-16 11:09:54+00:00)
Title: Checking new entities in ContentService.Saving event

There was no information about checking if an entity is new in the ContentService.Saving event.
Information gathered from: https://twitter.com/Shazwazza/status/496705715306627074