I find this to be true with the Guinness exported from Ireland (look for the 11th character "J" in the product ID code).
Whereas the fake Guinness imported to the US from Canada (yes, "bottled under the authority of .... yada yada yada) having a "T" in the 11th character, does not have the same soul nourishing properties.
Keep in mind the ingredients and crasftsmanship are essentially the same.
Guess it comes down to a matter of choice.
God Bless the Irish,
Tom