When you say really bad neck joint. Do you mean the joint is not solid(loose neck?). If you have a neck joint that is not solid it will effect sustain(simply dampens the strings). If the neck is solid it will perform.
As far as tone related "facts". Well it is not all BS. However the effects are much less noteworthy than if we were talking about an acoustic. Neck wood is noticable because it effects string vibration much more, but then again neck construction plays a big role in this also. All that said. The difference between fresh strings and dirty tired string is so much more noticable. I guess you could dismiss the effects of wood on tone when you compair it to other factors. Then again it does effect the sound of the instrument, so it shouldn't be ignored.
Peace,Rich
Yes I do agree that most differances effect tone and sustain. its kjust soooo subjective as to what is better, and how much so. The neck joint on my Strat has about 1/16 inch of a gap at the sides of the pocket. I could lossen the screws and pull the neck over so that the strings are claean of the fret board.
Still, it is bolted down tight and this so called major flaw to the tone of the instrument.....really isnt one. It sound great and sustains for day. For me, this blows another "fact". I dont think that this does not effect the instrument. It just isnt atomaticaly bad.
Of course, I would much prefer it to have a great neck joint.