For What It's Worth
At a previous company the habit was to complete the start and get it stabilized at 70% with the FCL, and remain below the flight gate until putting it up just before takeoff. Saved a little fuel and some noise. But I remember the check airman saying that at the factory school, all the training pilots completed the start, pushed the lever up to the flight gate (100% Nr) and then did all the checklist items from there.