I've never gone at that time, but have had friends that have. They said fast passes were gone between 11 am and 1 pm, lines there were still long, walk in lines were miserable, eating was a huge wait even with ADRs, etc, etc.
I would not go at that time. BUT, it most probably depends on what time you are used to going. We go in off season to regular season.
Touring Plans dot com has a good crowd calendar calculator. You might want to try there. I tried to insert a link, but the silly thing wouldn't work.