I hope they have cannibal halflings and muls
Pretty much, I and almost everyone who I know who played Dark Sun (which has been three different gaming groups with three very different demographics) just payed a passing glance to the Psionics. For my theater and humanities majors it was the campaign setting, for my anime freaks it was the cannibal halflings and muls, and for my video gamers it is (sigh) the sheer power they can amass in the setting (which was balanced by the fact that no matter how much they munchkined it, they still got their butts kicked). Most players I know rarely used their wild talent, even when it was something very useful.
As for phlogiston and crystal spheres, none of these three groups liked the concept. It ranged from "that is so unscientific" (which included my theater majors) to those who just hated the flow because you really couldn't do much while you were in it. Most mages in my game were pyromaniacs, and if there was an encounter the clerics were useless (generally they were sitting at the helm). So I ended up ditching the whole thing in favor of a "hyperdrive" which phased them with astral space, thus multiplying interstellar speeds by x365,000, allowing a speed of 0.6c per SR (I ignore relativistic effects). The fun part was the ships flying in space (which still ticks off my computer programming friend who thinks the entire premise is retarded).
Edit: I almost forgot about the blue collared workers (Bob, Bishop, Mike, and Gyro), but we never played either game, so I can't tell you what they're attitudes were.
Its kind of cool that so many different types of people play D&D, isn't it.