Thats an interesting question, Julio.
Both, long and short tracks can be fascinating evolving. I wrote short pieces of one minute length and they were perfect. I meditated one hour on my synthesizer and it was perfect.
The listening experience somehow reflects - in best case - the creation process. And although attention underlies alterations, this won't correlate with music itself.
Because music is timeless, it freezes us in the moment like in a dream (one minute, one hour, timeless).
PS: One short story - about my album "Sparkles". As the title says, the music on this album was intended to reflect the "Sparks".
"Sparks" are ultra-short light moments, and therefore the pieces also evolved very short. But originally I wrote 4 multi layered tracks for the album that I afterwards splitted into 10 single tracks.
I simply felt that the simple tracks reflect - within all unperfectness - a perfectness and deepness that they would have not reached with the multi layering.