I think I have at least enough common sense not to expect Guinness when I have a porter.
I was comparing it to other porters I have tasted, such as St Peter's Old Style, some of the one brewed by folks here, and so on. I admit I'm no expert on the style - I'm not an expert on any style - but at least I know enough to not knowingly compare apples and oranges.
I didn't mean to imply it wasn't a porter (though it isn't what I have been led to expect from other things calling themselves porter) just that it isn't what I like in a porter.