Not true at all. I've seem S&W, Ruger, and Taurus revolvers jam or malfunction.
Sure, revolvers can jam...but not because of poor grip, magazine issues or a dud cartridge.
Size is far less of a factor in the overall reliability of a revolver. As the size of a semi-auto decreases, reliable performance often diminishes as well. Smaller slides cycle faster, which can lead to ammunition feeding issues, which can happen without warning...and in a close quarter tussle for one's life, clearing a malfunction in a semi-auto can be the difference between life and something less desirable. With a DA revolver, simply pulling the trigger again is all that is required to get back into action saving one's life.
You are usually very limited as to increasing or decreasing the size of the grips to fit the hand better on a small semi-auto like you can with a small revolver.