Hi Marco,
I think It may be better to first get others points of view on this, I just feel sometimes I am banging my head mate, we can all refer back to the text books, and quote how things should work, but there seems to be few of us here these days who are willing to think outside of the box, and look at other aspects that could posibly have an affect, rather than taking the stance, if you cant measure it, its not happening, and therefore; those who experience these affects, are somehow deluded, or fooling themselves, I try very hard not to do that, which is why I usualy keep my explanations as non technical as posible, once you start spouting equations, and textbook speel, you lose the attention of posibly 90% of your intended audience!