Aer Lingus use Peri B for morning departures and night arrivals. Next summer as far as I know there will be more flights using Pier B up until lunchtime on certain days.
Some factors are the 11.00 to BOS will start to use USPC from 25 March, EK 777 from 1 July and extra Aer Lingus flights next summer.
My figures suggest approx 40 extra weekly flights during the peak summer months (May-Sep).