Another Penalty Lottery

I kept half an eye on this afternoon's Carling Cup final and decided to switch the Five Live commentary on when it went to penalties. I was just in time to hear Mark Lawrenson say something along the lines of 'yes, it's a lottery now'. After the event he changed his tune - he said that the Man Utd players took better penalties and deserved to win. So, is it a lottery or a test of skill?