I just drink the stuff, I know the absolute basis about the brewing process but would never claim to be an expert. I do know that gas can affect beer as they use nitro pumps on some craft beers to make it smoother. You mentioned the actual brewing process though....just curious what the person...
Is it possible there's no single defining opinion though and for these 'experts' you talk about to have differing views? This must surely be the case with beer and wine? What did he say that was so wrong? The area I work in has many experiences and knowledgable people with varying views on...