The Battle.net ladder reset a few days ago, and already some players are up to level 90+. Myself, I've managed to play primarily solo and get to Act 3 in Normal and a comfortable level 20.
I presume these other players are going in groups and helping each other out rather than soloing, but I don't think this explains all of the difference in play. I am also willing to make some serious concessions for the fact that I have many other demands on my time and have only played about 2.5 hours per night.
I tend to find all the waypoints, clear dungeons of creatures and then move on but it seems that the preferred style is to run through as much of the level as possible and just fight the end bosses. I presume that since higher level areas give more experience this accelerates levelling.
Is this method commonly called rushing, and if so what do you do to maintain good equipment and levels so that you can continue this process? Do you just revisit the choice areas in previous acts a couple of times and move on once you're competitive again?