In Boston, she arguably went out too fast, as her stated goal was to run 2:22 (she said so after the race), as Jerry and she thought that would be fast enough to win the race, and yet went out in 1:09:xx. By way of contrast, the Hansons ask their runners to approach the Boston course with a negative split.
But here, the pacers took her through the half in 1:09:38, which was only a 20-second "cushion" on the AR, which seems reasonable. She had thought her workouts supported going out at AR pace, and she was in position until the wheels somewhat fell off after 30k. If there was a problem in Berlin, it was that Jerry's workouts misled as to her fitness, or maybe today just wasn't that perfect day.