There are plenty of other legitimate no-cost things you can do to speed up Dolphin. Using an optimized build is one of the easiest. Overclocking helps too, though depending on the system, it might not be possible. Manually getting rid of background processes might help depending on what they are, e.g. you might be better off disabling a virus scanner rather than some obscure MS service that isn't as active.
But I agree, the thread title is misleading, as there's no absolute way to make sure Game Booster gives everyone 100%. If the hardware is weak enough, no gains in performance might occur at all. I'm still dubious about GB, so I follow the "if it sounds too good to be true" mentality. If it works for you though, more power to you. At least you're running games full-speed now.
But I agree, the thread title is misleading, as there's no absolute way to make sure Game Booster gives everyone 100%. If the hardware is weak enough, no gains in performance might occur at all. I'm still dubious about GB, so I follow the "if it sounds too good to be true" mentality. If it works for you though, more power to you. At least you're running games full-speed now.