I don't bother defending DRS anymore, because nobody's gonna change their mind at this point anyway. But I will comment on the nostalgia of days gone by.
You often hear Jarama 81 held up as a shining example of the glories of defensive driving. And while Villeneuve deserves enormous credit for handling that pig of a chassis, he harbored an enormous advantage with that Ferrari powerplant. Couple that with the fact that the 126 was a very wide car on a very narrow circuit, and you've got the perfect conditions for a stalemate. In fact, for several years in the early 80's the Ferrari's were incredibly difficult to pass because of their width and their sheer power. Hunt (and others) would regularly refer to theses beasts as "mobile chicanes". In my opinion, it was the vastly different car strengths that led to some of the more notable examples of a "slower" car holding off "faster" ones.
To those that lived through the Turbo era, I can totally understand why they would view this period as a superior time in the pantheon on Formula One. But change and evolution was inevitable, and it led us to a point where the cars became so similar, with such similar characteristics in terms of acceleration and top speed, that there were very few opportunities to seize on a cars weaknesses or to exploit one's strengths. It got to the point where something had to be done.
One final note on DRS in 2013. Entering it's third year, its become quite clear that the technical gurus have mastered the art of Drag Reduction. DRS is more powerful than ever because the designers have made it that way. People say there's no innovation in F1, but the DRS is a shining example of how the geniuses of Formula One will maximize the areas of the car that are open for evolution. It appears as though DRS may be becoming a victim of its own success.