My theory, based on LOTS of pheasant hunting, is that yes, you're probably rushing, but there may be a little more to it. It's so easy to be flustered by a flush, so we think the bird will be gone before we know it, so I have to get my shot off quick. This isn't usually the case. But it takes experience & the confidence gained from it to be able to take that extra second, collect your wits, get your footing right, safety off, get the barrel moving and outward & stock up to your shoulder/face....all while seeing the bird as clearly as possible & focusing on its head/beak (not that huge tail). Taking that extra second helps your brain really see how fast & what direction the bird is moving & before you know it, your barrel is moving & pretty well in the right spot at the same time your mount is completed. I think a lot of people SNAP the gun up first, & then all the other stuff has to catch up, which is difficult with a gun mounted. Instinct tell us to SHOOT as soon as our gun is mounted; not do all the other stuff. It's simply a function of practice. Also, I see a lot of people carry their guns down at their sides or over the shoulder. MUCH easier to quickly do the things described above from a port arms carry position. My $0.02.