We have different time out setting for FANS1/A and ATN users. During the day you need to be able to be patient with FANS1/A aircraft. During the night they normally as quick as ATN.
And although the comment is often that it takes too long with FANS1/A it is often forgotten that you still can do other things in the meantime. There is still net gain in frequency load.
On the ATN side the responses are good. Provider Aborts are less and less. We do notice a big difference with certain companies and the provider they use.
As for EZY (EZS) using ATN with ARINC for us is a great partner to work with. The crews are well trained and very quick with CPDLC.
Certain tasks can be delegated and the gain we have in reduction in r/t is really big. At times underestimated. You would be surprised by the amount of time saved if calculated.
Even the critics of CPDLC could feel the difference in workload when it once was unavailable to them. It was quite an eye-opener.
As we are more and more confronted with higher traffic numbers, shortage in staff and airspace congestion with flight plan restrictions, CPDLC at least has the potential to really make a difference in workload. It might need to get a higher priority to work on improving the system so ATCO can have the maximum benefit. Specially with all the hurdles on the way any help is more than welcome