Tagron
I have just read that Flightglobal report to which you provided a link. It looks to me as if there will be improved airfield performance because it says:
"A320neo V speeds are actually lower than those on the A320ceo ..... This enables us to offer very good take-off performance."
No doubt at some stage the performance graphs will appear in the public domain and it will be interesting to the actual differences between the two aircraft.