Those results might not be entirely accurate, as they are underclocked/overclocked, which may influence performance more than simply clock frequency alone. But it does appear to be multithreaded yes. Still i wouldn't say is scales well; with 2 additional cores at the lowest quality, lowest resolution i would have expected at least a solid 20-30% increase in FPS.
Even with games like this, it might still make more sense to invest in a dualcore, as they are higher clocked for the same price. With games like this it would be very close to the performance of a lower clocked quadcore, but in other games it would be very much faster since those are single threaded.
A good argument would be that future games will continue to improve with SMP performance, though i would still argue that it might still take several years and a dualcore at this point in time is still the best choice for gaming; they likely can be overclocked higher where quadcores would run into heat problems.
Its nice to see that at least some games are multithreaded though; but these are still very modest performance gains.