I tend to agree with both opinions, but I will add that the nice thing about it is that there is no right or wrong, and there are no laws that forbid listening to a system that you enjoy even if it is not fully transparent etc...
Naim systems are in my opinion far from being transparent or true to the real sound, but it doesn't mean that they are not good, I'd even say that the opposite is true. One may say that a system should try to reproduce exactly the sound of the recorded instrument, but in my opinion there are system that can do this close enough but when you listen you don't enjoy, you don't feel involved, so what's the point...? Naim systems are good in making you enjoy the music, even if they don't compare so well in A-B tests, so what?
My goal with every product that I design is to be as close as possible to the real sound of the instrument, but at the same time not to lose the pleasure from listening, and that part unfortunately cannot be measured with test instruments...
Saying that, I found that with power supplies (unlike amplifiers, distortions, etc.) the noise spectrum gives a good indication about the sound, and I can predict how a system will sound based on that noise spectrum. I used it while developing and improving my power supplies, and those who upgraded from TeddyCap mkII to TeddyCap mkIII can testify.
As there is no right or wrong, it's hard to say that everyone should buy a TeddyCap or everyone should buy a HiCap. For many years I had a HiCap and I liked it, I even enjoy listening to it from time to time with some types of music, but all in all for myself I prefer my own power supply (but I'm not totally unbiased...

Enjoy the music, Teddy