I am a guinness drinker, always was and probably always will be, however the pint in Ireland is far superior to any I have had in   Montreal, Boston, Toronto, Quebec City and many other places as well. The main reason is that Guinness should be consumed within 10 days of brewing, this is possible in Ireland whereas in other places it may take up to a month or more before it is consumed. This means that exported Guinness has preservatives added and this does alter the taste. In addition to this, the method of drawing a pint may have a small effect on the taste but mostly it is the preservatives. I should mention that I have had many a great pint in Toronto, but the best Guinness I ever had was actually bottled Guinness CMortons Red Heart Guinness), served in Kelly's Cellars in Bank street, Belfast, one of my first stops when I go home. I also think that many places are serving it at too low a temperature, this also affects the overall taste. The good thing about all this is that if there was no Guinness, there will still be lots of excellent ales, porters, stouts etc to keep us happy.