I think Mark f and Rob (filterlab) have nailed it. Spikes do make a difference to the sound, sometimes that difference is good, sometimes it's not. It all depends on the strengths and weaknesses of your system and the environment in which it is installed. The advice has to be try with, try without and see which way you prefer. The way that sounds best to you is the right way for you. The science does not matter, it's how you feel when you hear your music that counts. Don't let the marketeers compromise your listening enjoyment for the sake of following a fad.
Have fun folks!
Dave.