After attending 6 or 7 practice any coach should be able to tell whether or not your DD will be a good fit. The thing that would worry me is that he is hoping one or two other girls he has been really trying to get on the team will join the team, you won't see them tryout they will just show up and start day one. I would think after a month of practices you should be able to sit down with the coach and either have him commit to her being on the team or start looking elsewhere.
just my two cents...
David, I think that you hit the nail on the head. There was a girl that we hadn't heard about before that suddenly showed up and was wearing one of their practice tees at the last practice. He's also been having problems with girls not showing up to practice so I'm wondering if he's using the girls that are trying out as a last resort. My daughter has heard him mention to one of the asst coaches that he is going to start cutting girls for not showing. I think we'll talk with the other team.