In every encounter I've been in, I don't even recall looking at the front sight, or even at my weapon... period. I do, however, have vivid recollections of the BG.
It didn't take me long to learn to go with my instincts, rather than against them. In real encounters, all but those with ice water in their veins will resort to point shooting. How good you are at it depends on whether or not you train at it
.
An interesting side note: Our studies of results from F.A.T.S. training showed that the first thing you focus on is the BG's weapon, and usually, that's where your first shot goes.