Slew rate and rise time

Sean, excellent "Article." I'm going to keep it for a reference. I have never seen all of this subject matter put together in an understandable format with the relationships such as this. You have again increased my knowledge of what I hear vs design parameters. I knew what I have heard but the why has been in some question.

I personally have read enough to understand Sean's analogy and even though "technically" it needed a "Slight" bit of refinement, I thought it was an excellent post allowing these parameters to be interpreted in an overall scheme. I also enjoyed Herman's post(s).
I would like to ask this, when looking at the effects of negative feedback in an amplifier, how does local feedback vs global feedback effect the overall musicality of the amp or overall performance (is there a compromise in here somewhere?)
I have seen a few amps that featured no global feedback but used local feedback and then, according to Charlie Hansen at Ayre, use no feedback, either local or global. Which type of feedback would be most audible or does it all equal up to about the samething?
I feel there is something to this feedback thing. Even though the no negative feedback amps do not offer up the "Slam" of feedback amps, they do seem to sound(for lack of a better description) more tube like. However, I can certainly see why someone might pass on the zero feedback amp if running it full range. The bass is a little light compared to some.
A really good example was when I compared the Parasound JC1's(39db of global feedback) to the 0 feedback Ayre V5xe amp (yes, I owned both and still have the Ayre.) Yes, the JC1 sounded more visceral but it also sounded more "Hi-fi-ish" overall. The mids and highs portrayed by the JC1 just didn't sound totally realistic. The Ayre was more liquid and harmonically rich. Also, the portrayal of the soundstaging cues seemed more fully developed through the Ayre (deeper stage cues vs a somewhat flatter stage presentation.)
I use subs, so the bottom end is not that much of a concern with me. Soundstaging, natural mids/highs and liquidity is.
Can this be directly related to the feedback or is it more of my personal preference to one sound over another or do I need to look at other parameters? I kinda would like to know why I hear what I hear or if it is truly just a personal thing and has nothing to do with design.
For general information, the amps were both broken in and used on 20 amp dedicated lines(2 in the case of the JC1.) I listened to both at around 85-90db or lower and my impressions stayed the same. I guess what I'm trying to say is the JC1 was kind of like a GTO, Camaro or whatever (lots of power but a touch short on refinement) where the Ayre was more BMW like(The Theta Dreadnaught also seemed this way-another zero feedback amp.)
BTW, this is not to disparage anyone who owns the JC1's but is related in context to design and its effects. This was my take over an extended period in my room with my equipment.

Makes sense. I know in the Ayre amp, Hansen does use a lot of handmatched output devices. On the other hand, I don't know how he gets the amps noise floor so low and the "Blackness" between the notes with this particular zero feedback design. I do know this is one of its strong suits along with a simply holographic soundstage. He recommends against using any power conditioner.
The other point is it clips like a tube amp, fairly gradual and the distortion figures are relatively high for a SS amp at max output (something along =>1% at max power.) The amp does double down and is stable into low impedances(a good thing for me since my speakers do dip near 3 ohms at a few points.)
Now, another question, I have heard that feedback alters the "Phase and time" relationships of the input signal(global feedback) if you look at what arrives at the output in comparison. Is this true? Is this what you are refering to above talking about delay? Would no neg. feedback amps pass a truer duplicate of the input signal(based on other parameters remaining the same?)
Just in passing, I was in the smaller amp camp until a year or so ago. I biamped using smaller amps. They just sounded better overall(provided they were high quality to start with.) It seems bigger amps have caught up now ( at reasonable prices) and some are truly excellent.