When I moved from an 319 fleet to a 320 fleet this was something of a surprise to myself. The 320, with A/P engaged will only give 1/2 speedbrake. Some of our pilots only put the lever into the 1/2 position, I do not as I seem to think that will only give me 1/4 speedbrake....am I correct, I always put it into the full position if I want 1/2 or full...depending on how you look at it!!