Alot of this lyes within the adaptive learning strategy that our trans. has. FSM06 hit it on the head (he is a master certified Ford trans. tech after all) when he described the rolling stop scenario......if you're typically one to just california roll through a stop, the trans learns this and only goes down to 2nd most of the time, however, come to a complete stop and you surprised it, so it has to jump down to 1st unexpectedly. This is what alot of people feel when they talk about the harsh 2-1 shift or feeling a bump after they stop. The same theory goes for taking off and the 1-2 shift whether it be when it shifts or how hard it shifts......tend to take off nice and easy, it'll get up into 2nd quickly (because the overall shift program from the factory is geared more towards fuel economy, so it wants to get up in the gears quicker)....tend to take off with some authority, it'll add that pressure for the quick shift. Now after averaging the authoritative take offs and you do the nice and easy method, wham, you'll feel the hard shift to 2nd that the trans. is used to. Most of this is the truck just showing you your driving habits, that's why some people experience it and some don't, not everyone has the same driving habits. As for it doing it in the morning or first start-up, just like eng., the trans is cold too, it needs to heat up and "let loose".