The grip size has little to do with the "accuracy" of the firearm. Let me say this yet again. ACCURACY IS A FUNCTION OF THE SHOOTER NOT THE EQUIPMENT. That being said, they do take a little getting used to. Gripping the pistol with only two fingers instead of three is not the norm and takes some time to get accustomed to. The addition of the finger tab floor plates defeats the purpose. Adding the third finger position equates to the same grip(and grip size) provided in a Glock 19/23 without any gain in performance or capacity.
How does it shoot? I shoot my G26 as well as my G17. Do they feel the same when shooting? No. The reduced length and mass in the slide as well as the reduced overall mass of the pistol increases the felt recoil. Its not painful but it is noticeable. The Glock sub-compact line was designed as a back up gun and/or concealed carry option. They shoot well, they work like any other Glock, the only difference is in their dimensions.
TDC