that doesnt mean they're all the same!
In the UK we have a set minimum height for any ppl that should so desire to join the Police Force. This could quite easily have been the case when ANH came out, GL wanted to show that the Stormtroopers all had to have been of atleast a certain height to conform with the fact that their armour removed any sense of identity/humanity, thus appearing all the same. Would the comment "Aren't you a little tall for a stormtrooper" been said to Han if he'd rescued her, considering he was meant to have been in the service of the Empire.
Jimbo you really need to keep in mind that what GL thought 25 years ago is not what he's thinking now and likewise in current interviews etc what GL is saying he always intended (the good old excuse of the backstory) is not the case. He is clearly making it up as he goes along (hmm Indiana Jones anyone??), changing whatever he feels is needed to make the 2 trilogies come together. Do not be fooled Jimbo!