This may make a difference with an internally mounted microphone. The vibrating reed is right up by the orifice providing an overriding level measured in db. Reflective waves do eminate from these holes as well, but are unnoticable to the majority of ears. The blend of harmonics from all stops open and playing in octaves really swamps out any reflective waves.
I age my violin woods for two years. The wood is supplied air dried as well. I stopped building guitars 10 years ago. Playing the bowed instruments and many acoustic guitars (not all!)change the tonal response and in almost all cases, for the better.