Irish user here. I was first pushed the new Maps around a week ago, sometime on 25/9, having been following the rollout on
Justin O'Beirne's (great) blog. First thing I did was check to see if it supported Eircodes. What I noticed was that when you inputed an Eircode (for example D02 AF30), the correct address would appear in the search results, but when you clicked on that correct result, Maps would redirect you to a generic location covered by the first 3 digits of the Eircode which is the
Routing Key, i.e. D02 AF30 and D02 N403 would both direct you to the same random location in Dublin 2. I reported this to Apple at the time and at some stage since, I don't know when, the correct address no longer appears in the search results when you input a full Eircode, and the same thing happens in that you are brought to a random location covered by the Routing Key if you enter an Eircode. So Apple definitely tested full Eircode integration at some point, and the system does correctly identify the
Routing Keys, so hopefully they will roll it out proper soon. Have to say if they don't I'll be disappointed, Apple will never be able to match Google's wealth of user-supplied info on businesses etc, but at least if you have an Eircode for the business/location, the Map can get you there regardless of it's aware of the business for not. For many Irish (particularly rural) users, this will be a deal-breaker in the switch from Google Maps.