Yep I agree that it's too soon to change. By slowly moving back 15 mins each day, and keeping it for 3 days before another 15 mins setback, you can let her adpat easily to the change.
Also, as an additional thought, remember that Tracy also used to plea for what's best for the family. SO if your lo and you and your partner are comfortable with that bedtime, I don't see a reason for changing it. My ds is also a very late night sleeper (he also goes to bed somewhere between 930 and 1030). Im happy with the late mornings! im soooo not a morning person!
Whatever your choice is, you can adjust your baby to the timing you're comfortable with! and we're here to help!