You should also ask the guy with the Taurus what springs he has in his pistol. Just because a pistol is "butter" smooth doesn't mean anything. He could have simply put a lighter guide rod spring and main spring in his pistol. That alone would make the pistol feel very smooth but, depending on what loads he is shooting, he could be hurting his slide and barrel link badly.
I own several Baer's, a Wilson, and a Custom Chambers. They are so tight that they literally feel like something is wrong with them (we are talking about 3K-8k pistols).... and they definitely are NOT "Butter" smooth like my Pardini GT45 or my CZ CTS Custom are. The CZ is made for competition where accuracy is not the main goal (speed is) and the Pardini's slide,frame and internals are FAR different than the 1911. This allows it to get more smooth. Those pistols are not able to shoot under 1.5" at 50 either.
Your Kimber probably will not hit that 10X mark (Kimber only guaranties the Super Match II to be able to achieve that). And in all likely hood you would not be able to do that anyway.
I would not worry about the smoothness of your pistol man. I would take it to the range and practice... Shoot it until you know the feel of that pistol! Here is the biggest thing, the shooting ability of your Kimber and your friends Taurus may not be that noticeable in either of your hands. Most folks who are not avid shooters think that buying a higher end pistol will automatically give them better accuracy than that of a cheaper pistol. Thats just not true This is definitely something that often times leads to a let down, leading to the impression that the cheaper pistols shoot just as good as the higher end ones. Accuracy is in the hand of the shooter... not the pistol (to a point). A poor shooter will shoot a $400 dollar pistol the exact same as a $5000 dollar pistol. Only a refined shooter will be able to tell you the differences in the pistol.
I am not lumping you in there but, I will just say this, most folks are not nearly as good as they think they are.
I can personally attest to this as I get in arguments all the time with shooters telling me that they shot their Rock Island just as well as there buddies Baer or Kimber or whatever and that these $1200+ pistols are over priced and a scam. It makes me laugh
You have a great pistol. Leave it just as it came... Kimber sent it to you how it was meant to be set up. Unless you start changing materials on the slide etc leave the springs how they are, dont "polish" anything, just shoot the thing man. There is a reason you paid $XXXX for it. It wasnt to start changing and polishing shit on it. Tell you buddy with the buttery smooth Taurus that you are happy his pistol is buttery smooth, and just be happy that you don't own it... You have a Kimber.