I just mean that the note falling on the first beat occurs after the vertical line indicating the start of the measure. So in the above example - a screen capture from one of the songs on the GT website- there are the vertical bars labelled 6, 7, and 8 (which I believe indicate the beginning and end of each measure), and then some space and then the first beat. To me, that suggests that the first beat occurs after the start of the measure, not at it's onset. But since I'm unaware of any way to notate a note that precedes the first beat (and exists within the same measure), I'm guessing that it's shown the way it is for clarity. Not because there is actually a delay between the beginning of the measure and the first beat.