Did it open up the soundstage, give the treble more sparkle, smooth out the low end, and make everything more natural, musical, and magical?
Oh, the science of audio is very sound (pardon the pun) and well understood. The mythology comes from the fact that technology moves slower than marketing, and the fact that we figured out how to make damn good sound dozens of years and thousands of dollars sooner than audio companies would have liked. Combine that with a general consumerist desire to upgrade!!! and you've got where we are now.