"Teething"

So Sebastien Vettel is running around saying that he thinks he is at an advantage starting out the season with last year's car. I really don't know how accurate that statement is. One the one hand, you're already familiar with what you're driving and while everyone else is still "teething," as Vettel is putting it, you're (hopefully) scoring effortless wins (not probable). I wonder if he has thought about the other hand and considered the fact that he will begin the teething process almost mid-season when everyone else is comfortable, calm, and collected. Not that I'm trying to rag on Sebastien Vettel. I just wonder if he's thought about this.