It's good to see we are haveing a healthy discussion.
2 points, I think I've mentioned before, that's been raised up again agian.
1) Guiness and other breweries are trying to brainwash us with 'extra cold' beers.
It's good that, as someone said, there's bars in Limerick, givibg people the choice of regular or extra cold Guiness.
2) The craft breweries advising on what temperature, their beer is served at. Dungarven and 8degrees already do this . If you you check their bottles. Mind you, their bottles are 'Bottle Conditioned' (ie fresh yeast is added into the bottle)
I think it was UpsideDownA, who said chilling ale, kills the taste. The temperature test is a good wee experiment, you could in the house