I'd say shoot to be there at 7am for a 9:10, too. The terminal 1 experience can be unpredictable, but the traffic from central Paris can be unpredictable, too. I am one of those who builds in extra time to deal with anything going wrong, and though the amenities in terminal 1 are lacking compared to 2, the Star Alliance lounge on 11 is nice enough to spend your extra time in and has a good hot breakfast - pancakes, omelettes and the like.