I live in a hard water area and when brewing English Tea I can definitely taste and see the difference when compared to where I'm from, which is a soft water area.
Does the hardness of the water matter when making coffee, too?
For instance, whether or not the taste is more or less intense depending on the hardness of the water. I haven't noticed but I would think it does affect the flavor.
I'd be interested in a scientific/objective view. As of now, I use bottled water in my kettle.