Well, the rush to 70 is just reaching its stride. On my server, I did a quick "/who 70," and during prime time I saw about 17 people on (one of them in my guild). Another guildie is at 69, and a few more are at 67, which means a good ten or fifteen will be 70 within the weekend, most likely, and there will only be more after that.
And yet frankly, I'm not all that concerned with getting there. Sure, you might say it's a copout (I haven't won the race to 70, so I'm quitting), but even though I played for quite a bit after the expansion first released, my leveling pace has pretty much dropped back down to normal-- not too fast, not real slow. Enough to make the quests fun, but enough to keep it moving on the rewards end. And even though I'd be getting more XP in the other zones, I haven't even left Hellfire Peninsula yet-- partly because I want to see all the great lore and scenery, but partly because, like Mystic Worlds, I'm really in no rush to 70.
Because while all the "good" raiding is at 70-- the exclusive 25-man endgame stuff-- that's also when I stop earning XP. And unless I'm headed for a specific item or attunement, it seems to me that playing solo without XP is a waste of time. The game ends at 70, and I'm in no hurry to end it. So what about you-- are you making (or have you already made) the mad dash to 70, or are you stopping to smell the mushrooms in Zangarmarsh?