I asked myself the same question about a year ago when I started shooting 2011 ( I only use long flat on 1911). So, I got a measuring tape and I measured from the front of the trigger to the back center of the mainspring housing on my trusty 1911. I then made my STI 2011 match the same distance. Funny thing, it too is a long flat! I got the plastic flat blank and hit it with a file a few times because I just couldn't accept the fact that the difference was negligible. Anyway, dry firing and slapping the trigger like boldaslions said, without disturbing the sight picture is the goal. You should do whatever is needed to achieve it. My accuracy when shooting slow has never been an issue but for running and gunning I have personally found long flat works best for me. I also put a good amount of finger on it because that what works for me. You have to find what works best for you as i don't believe this is a one size fits all. Hope it helps and good luck to you!