Just saw this: http://drinks.seriouseats.com/2013/...history-freshest-pint-ireland-slideshow.html# . 119.5 seconds per pint.
Did that tour in the summer of '99. It was pretty neat. Friends and I were so hungover from a pubcrawl the night before, though, that we could barely touch our free pints of Guiness at the end. So hungover, in fact, that when we arrived at the Jameson distillery later that day, we decided it best not to go on the tour and never made it past the gift shop. Epic fail!