Having completed 6 x SYD > DFW > PHL trips in the last year on QF7 & AA I never had any issues in DFW with a connection of 95 minutes on average.Most of the times my connecting domestic AA flight was delayed by at least 30 mins or more anyway (handy hint: sign up to email notifications ...

If your (AA?) flight to Dallas is on time, you should make the connection. From experience, domestic AA flights are notoriously late. Can you give yourself a few more hours as a buffer?