My apologies for the confusion which seem to have
resulted because of my missing a miserly comma somewhere. Hopefully any 320 driver after reading my post would understand that it is half elevator down in normal case and full elevator down in case of any amount of tailwind( I do know that the tailwind limit is 10 kts) or crosswind in excess of 20 kts.
With this clarification, I am still hoping someone experienced on the 320 will be able to clarify as to why this difference? Really interested in the aerodynamic effect.
Grateful to all those who have contributed so far