Most of my water knowledge comes from reading brewing science texts and trying out things with my own beer. Brewing science texts seem much more cautious about mineralising water (admittedly most of the research is possibly more relevant to pale lager beers) than home brewing references.
I need, for my own curiosity, to try out a UK IPA made with 700+ ppm of sulphate. I would also like to try a commercial example that I knew was made with the same.
The problem I have with 'famous brewing centre' water profiles is that water profiles change constantly and where a brewery takes its water and what it does with it once it takes it is not always taken into account. Burton on Trent for example is supposedly drawn from well water rather than river water, Dortmunder export, despite the local water being high in sulphates and carbonates is supposedly low in minerals due to german brewers practising water softening techniques etc.
So who knows if water profile A is firstly correct, secondly what was actually used, unadulterated and thirdly what will actually make the best example of a beer? Even historically speaking, breweries treated their water, blended it from different sources, etc.
However I have also read historical references (second hand) that suggest the very act of boiling wort can precipitate various 'hardening' minerals, leading to a finished beer that is low in minerals, despite the hardness of the brewing liquor. Maybe super hard water makes great 'soft' beer?*
It's all very interesting and I think a lot of what is available for reading simply scratches the surface. Certainly what I know is just the whisper of the cold from the tip of the tip of the iceberg in the photo on the wall.
*Read some of this in the shut up about barclay perkins blogspot. Also the insistence that dortmunder needs to be made with highly sulphated and carbonated water yet analyses, according to Fix (principles of Brewing Science, 2nd ed) suggest that the finished beer has very little is interesting.
Ah water treatment. Just when you think you have your head around it, something comes along to bite you in the ballsack.