I love my 1911's, I carry a Kimber in my backpack along with my laptop, and it's just a great little .45 gun.
I haven't worn or trained with my GLOCK 30 for some time now. I put my paddle on, slapped the 30 in there, and damn, it just hides so well at 4 o'clock.
Since I did most of my firearms training with the 30, it didn't take too long to get my draw so it felt natural, about 6 or 7 times, concealed.
There is just something inherently stable about a GLOCK. From the sound of the slide racking up another round, to the way it feels molded to my hand.