A trained guitarist's ear might notice the difference, but I highly doubt a crow would care. Also you are overstating the difference, and by no means is your opinion uncontested (just putting this out for the non-guitarists in the HN crowd). Even for those who can identify and prefer the tube sounds, digital modellers like Kemper do exist and do exist and seem to do a fine job in blind tests (see for example Anderton's on youtube).