When one is using channels, is there a 2 day delay in seeing the composite results? Or are the total impressions always correct and it's just the portion of data that is not known. Also why does Google do this? It seems they make you wait on purpose as though one could use this information in a deceptive way if it wasn't delayed for 48 hours.
A Google search for reason adsense channel delay shows that DigitalPoint has already commented on this.