This all started in my IDPA club as I went out to purchase a new gun about 18 months ago. First I wanted a ParaOrdnance P10 or P12 and was told not to do this by many of the master competitors including a highly decorated SWAT cop. The contention was that when the barrel lengths shrink below 4 inches the 1911 design becomes inherently flawed. I went my own way, trusting some very good articles read in various magazines and lo, discovered my buddies were 100% correct. At least as far as the P10 was concerned. I tried a buddies P12 at a match one time and suddenly found a whole host of similar problems which were duplicated when other club members tried the gun to see if maybe I was suffering from the notorious "limp wrist" problem. My shooting style was rigorously inspected as I ran a course of fire by my fellow NRA INstructors and IDPA Safety Officers. No deficiencies in technique. I should hope NOT!
THEN I went and bought a Springfield Armory "micro" 1911 and found it had a bad extractor, which I replaced all to no avail. I had continuous problems with failure to extract as well as the ever present double feeds. I got rid of it and settled on the Sig Sauer P245. No complaints since. Not one. I can compete with the P245. It's barrel is 3.9 inches. Four inches for all intents and purposes.
I wrote COL Jeff Cooper a letter and received a hand signed reply from him in which he allowed that he has heard a number of complaints about the mini 1911's and indeed he made that subject the lead topic in his most recent "Cooper's Corner" column in Guns & Ammo magazine. I'll never own a 1911 that has a barrel less than 4 inches ever again. I would consider a Kimber compact since that seems to have a Commander sized slide but an Officers sized grip.
However, I'm still examining designs other than 1911 in .45ACP such as the Beretta 8045 and the CZ/EAA models. However, I'm so happy with the P245, that my next purchase is going to be Big Brother P220. I already have five 8 rd P220 mags since they work in the P245 as well.