I remember seeing a press conference where they were showcasing a Formula 1 game, supposedly played on pretty low-tech hardware or something. What was plainly obvious was the over-the-shoulder cameraman who's shots were shown on the big screen catching the dev hitting the 'play' button on windows media player of the scene he was uh.. 'playing'.
Also, there was a game play video on one of the PC game review website which actually showed the cleanest gameplay of Ashes 13. Only minor bugs were eveident. I think that certain bugs become more evident, not if you engineer them, but avoid playing a certain way (like throwing the ball for the stumps rather than to the bowler/wicket keeper, pushing for runs, playing certain shots). Certainly they could have played the game a certain way to reduce the chance of certain obvious bugs showing themselves to a bunch of PC press.