From the above Airbus release : "Airlines will benefit from the 25 percent less fuel burn per seat compared to previous-generation competitors".
If I remember correctly, 25 percent is more than initially promised by Airbus when the programme was launched (I assumed the comparison is with the A333). Is this where we see that the A330neo beats expectations ?
EDIT : the comparison cannot be with the A333 since Airbus' initial goal was 12% less fuel burn per trip and 14% less fuel burn per seat. I suppose - 25% means that the A339 is compared with the 767.
A few weeks ago when the A320neo was delivered to TAP, the company sent a communicate to their employees about the fleet renewal plan in which it was stated that they will take 21 A330neos. I don't know from which lessors they will take the 7 extra A330neos from their initial order, but I was aware about their intention to take at least 20 A330neos.
As for the delivery schedule for 2018 it remains the same, for 2019 I believe it will stay the same and the remaining 330neos will be delivered in 2020. By the end of the year when deliveries start to roll out, I should be able to give more concrete dates. Also, the delivery schedule that I've posted before can be found here.