GibsonLesPaul
Experienced
What about the other electronic devices? I remember when I was at college labs, RC filters and transistor circuits never behave as the books predicted frequency response curves never were smooth curves and the parameters never were the same as the nominal values - in some case they were out of the tolerance range (example: a 470ohm +/- 2% resistor was in fact 450ohm). Maybe you should compare theoretical models of resistors, capacitors, inductors, etc, to the real ones too, as you did with tubes.
http://forum.fractalaudio.com/threads/no-two-amps-sound-the-same-fact-or-fallacy.109537/