Roberto,
You have much more technical knowledge than I about electronics but I must respecfully disagree with your comment "good .... means heavy gauge". We all know cable issues lie in the land of subjectivity, system snergy, component colorations, room acoustics, and all that other voodo stuff.
I am convinced, based on my experience with Mapleshade speaker wire, that the opposite is true. Pierre's wire is quite small, relatively speaking and sounds wonderful in my system which consists of Summits, Classe Audio CA150 amp, CJ Premier 18 LS preamp, Theta Miles CD player, and the Michael Green clamp rack.
From my reading of Pierre's theory on wire, "thick" cable induces colorations due to "skin effect" on the actual signal which results in a less accurate sound being sent to your speakers.
I encourage everyone to try the Mapleshade speaker wire. If you don't like it, they offer a 30 day moneyback guarantee.
GG