You will get the same result as that dawbench crap website, simply because you will be desiging a benchmark that will give best multithreading results.So why don't you all stop arguing about stuff that doesn't matter at all and do the test already ?
Take 8 mixer tracks, all independent (no routing between them), place the same CPU-hog plugin in each track, and you will get good multithreaded performances.
..but this is not how any real project looks like. A real project will have a CPU hog in 1 track, one light plugin in the second, 3 CPU hogs in the third, 2 lights in the 4th, the second track chained to the third, some plugins having their own multithreading, etc. This is what you should test, a real project.
For benchmark projects, multicores can be very efficient, like on a quad you can process 3x to 4x a CPU hog plugin at the same time as 1. For real projects, multithreading (yes, multithreading has a CPU cost itself) can sometimes result in worse performances (making a thread wait for an event has a CPU cost much higher than the one of a basic equalizer)