Would not have thought so but more runway slots means more opportunities for basing more aircraft if required. More likely to be a combination of landings and take offs including biz jets or the first wave of departures bunch up a little. Last year the first wave had departure times from 6am. This year it is from 5.50.
Just my humble opinion, forget the runway, the real flow rate is set by the number of cars the drop off zone can handle.