The British Sound

Ok I know this sounds ridiculous but hear me out. The British sound is characterized as being laid back, mellow and unagressive in the treble. It struck me that England is a very humid environment. And in high humidity conditions, the treble is more pronounced and shrill. Musicians playing outside before a rainstorm call this condition the bloom before the thunderstorm. Ive read that this state can be explained by physics. The reason I thought of this again tonight is because right now the weather is extremely humid in central NC tonite. I listened to my stereo and I had to turn down the treble on my speaker controls. My AC has not run all day. I ask, is this why they tweak their designs. They are only trying to make musical equipment perspective of any environmental influences. Am I way out in left field? Then tell me why their products including speakers sound that way. Mike