I pocket carry a Sig P229 RX all day, every day. Duluth Trading Company cargo pants/shorts accommodate that perfectly in a Sticky holster. It comes out very quickly. I'd challenge most under the shirt, inside the waistband carriers any day for speed to first shot.
But probably more to the point for me is that it's a very comfortable way to carry. And if you don't find a comfortable way to carry, most are not going to carry very often. I've watched my wife struggle with that. IWB, belly bands, purses, planners, etc. She has not found a good way that works everyday, so she rarely carries. I've read that 90+% of CC permit holders do not carry on a regular basis. Easy to believe.