First let me say I read audio gear reviews all the time and generally think the person writing it is full of shit, so I say this with reservation knowing others will think the same of me, but....

Yes these were a big change tonally. I actually felt like my imaging got better with these cables, the speakers just seemed to disappear into the room or gain a surrounding quality...I also felt that the highs were a bit less strident, but I actually noticed that happen with the silver cables the very first time I use them. I had a set of silver 12awg cables and a set of 14awg copper before and I was very surprised in the improvement. I am not one to fall for psycho-acoustic improvements, and I even had a couple friends and my wife listen and try some blind testing too, all who agreed it was an improvement.

Like I said this is a cheap DIY thing, unlike others who hear the difference they want to hear because so much of their money went into the cables.