this type of question is subjective to the individual
it does not really matter how you clean, whether your fast,slow,rinse a lot,rinse very little,do the top frame, leave the top frame,do the sills,dont do the sills,fan jets,pencil jets.
i was with Richard from isparkle that guy can move he would clean a whole house in half the time i take and his technique is different from mine,
the real test is your customers they are surely the ones who decide if its good enough,so whether you taught your self or learnt you still aim for the end result.....customer satisfaction....imo