I'm not saying that draught Guinness is not a palatable quaff, but it is NOT real ale and doesn't get anywhere close. It is filtered, pasteurised and served under gas pressure. Everything that was wrong with mass-produced keg beers in the miserable 70s. In fact, draught Guinness is probably even more mucked about with than they were when you take into account the shenanigans needed to get that head on it. Faint kudos to Guinness for producing a distinctive and popular product, but beer aficionados will look elsewhere.