The Old Fuff will again point out that when you cut two inches off of the front end the slide becomes much lighter, and therefore moves faster - sometimes much faster. This upsets the critical timing that Browning built into the full-sized pistol, and accounts for its reputation for reliability under all circumstances (at least in older guns).
At the same time shorting the slide reduces the length of the recoil spring tunnel, and requires some innovative (?) recoil spring systems. This requires more frequent spring(s) replacement.
At the back, run-up (the distance from the slide's most rearward travel to the back of the magazine) is shortened. This makes magazine spring tension critical, because if the slide picks up the cartridge too high on the rim the round may nosedive too low on the feed ramp, and you'll end up with a vertical jam.
Now this doesn't happen all of the time, but it does happen enough to make the Old Fuff a bit leery when such a contraption is carried as a personal weapon. I believe that Tuner, who has forgot more about the mechanics of the 1911 platform then the rest of us know, thinks the same way, for the same reasons. It's not so much a matter of some guns that do work, but rather then number that don't seem to. The Old Fuff has been around long enough to figure it isn't too bright to take any chances on a weapon system that might - just might - be questionable.
In my opinion the CCO is a good compromise. You have the Officers Model's short butt (which is usually what you are trying to conceal) with the longer slide, barrel and recoil spring tunnel found on the Commander. Those that review past threads on this and other forums will soon discover there a far fewer complaints about the reliability of Commanders over the ones that are shorter.
Of course my technical discussion isn't likely to change the minds of those who find the little pistols to be so cool - not to mention easy to carry. But again the Fuff discovered long ago that "cool" and "easy" are seldom the best reasons to pick something for a personal neck-saver.