As for the article at the beginning of this thread, the writer has a point. Federer is kind of a "throwback" and it's perhaps easier to appreciate his style if you're a bit older and have seen a few generations of players. However, the traits that Nadal exhibits at first glance, the power, strength, athleticism, are almost "gladiator like". You notice them right away, and it's something that might be more appealing to the casual tennis fan. I think it takes a more thorough understanding of tennis in order to appreciate the nuances of Federer's style of play. That's not to say that you can't know a lot about tennis and prefer Nadal over Federer of course, but I believe the point is valid nonetheless. To use a film analogy, Nadal is more like a great summer blockbuster, while Federer is more like an arthouse film.