In previous seasons there's been no pressure going into second half of the season which there will be this season. I still think a lot depends on what we can do in January. 2 or 3 quality additions could well make all the difference.
The other thing is there is real compitition for that 4th spot this year. Obviously the 2 Manchester clubs will be fighting it out for the title. Chelsea still IMO will comftabley end up taking 3rd.
Then for 4th....Everton, Spurs, L'pool, Arsenal stand real chances and are all capable, especially if they have positive transfer windows. Also the decent west brom, Newcastle and west ham have outside chances of being very good teams 2nd half of season.