Re: Are bolt-ons more articulate?
My personal opinion is that glue dampens tone, more glue deadens tone more, and depending on how the neck is constructed this can or can´t be a good thing... Think of it like spraying that rubber stuff under a car, the more you spray the less you hear. Some is essential, but too much slows up the transfer of sound, deadening it. Same thing with paint, BTW, Less is more.
On a bolt on (a good one), there´s a solid wood-wood joint, no glue. The vibrations from the neck can travel unhindered through the joint into the body wood.
On a "classic" set neck, it´s a similar joint, surface-wise, but it´s smothered in glue. any which way the vibrations go, they have to travel through a thin laver of damening material (glue) before they reach the body. this also accounts for the slightly more sluggish response of a set-neck
On a Deep tenon (think PRS)/ set through or neck through, you have a much larger contact surface, and this counteracts the dampening effect a bit by allowing more of the vibration to travel through at the same time. On a neck thru you also have the advantage that the clamps used to fasten the body wings for drying generally give more pressure than the ones used for setting in necks, squeezíng out a bit more glue.
The neckthru has the disadvantage that it´s construction adds a strong low-mid spike to the sound because of the way the vibrations travel (they reach the end of the body much faster than the sides of the wings). The advantage is that the vibrations also reach the pickups faster, making the overall response seem a bit faster.
None are better than others, but I consider Bolt ons as "neutral", set necks as "slightly warmer and slower", and neck-thrus as even warmer still but somewhere in the middle, response-wise. Assuming , of course, that ALL other factors remain equal (admittedly making it hard to test for non-luthiers). I personally prefer neck-thrus and Bolt-ons
