Villa; That looks good in all the books and some do it that way and on the states side you see it more than you do here. That's not what you see when you have a crew that can put up a house in days not weeks. The problem with that is just speed, you will have jack studs to fit an eighty inch door, different for outswing doors window may or may not be at the same height or at various heights. Up here most are into production framing and yes this should have been filled in at the time the wall was built.
Putting the header high or low makes no difference to the strength, the material used, only thing is time.
If we start the day on a freshly sheeted floor we don't build a wall untill the floor is lined out, all the plates are tacked together and layout. All headers are cut all jacks are cut and nailed to studs, all criples, blocks and sills are cut evan the second top plates are cut and ready to go. All the double or triple studs are nailed, we use "Ls" up here and they are nailed togther.
We put the same people on a givin job for the speed of just knowing what you are doing every time.
Depending on who gets finished first sometimes we have sheeting cut for the first two or three walls before someone starts nailing walls together.
We have to drill hole in every dead cavity so we predrill a bunch of sheets will they are still on the pile, If we are not done that floor by noon the next day we are having a bad day, that's with a three man crew on about fifteen hundred sq, feet.