I have the feeling that the bonus possession afect, but only if is +8% +5%.... then have some influence in chances/options and too can have by my viewpoint the same benefit as have the correct man in corners/fouls, that sometimes means = 1 shoot = 1 goal

So... to finish my theory I will say that one have only to start been worry if the differance of possession is of 8%+ and really a little worry deeply if is 12%+.

We all've seeen that differances of possession in high mode are not decisive always so till here my theory.
LOL