I only know, when I played(again, on my level), when my team was putting out the defensive effort AND everyone who I suspected to be able to shoot it well when the rock was passed to them,hit a high percentage, I gained confidence in my own shooting and this breaks the will of opponents.
Similarly in reverse, working hard on defense then not shooting well tends to be a buzz kill for confidence in my own shots(more pressure(?)), as it really distrupts ones "zone" of confidence...
And this too is where the referee calling stopage really use to irk me, as did trash talking too etc...
So, in reply to the poll, I voted "trend"!