Sorry reb23, but as long as it's cheaper for me to drive to Dublin than take the train, I won't be giving Irish Rail any credit for anything. It's a bloated, inefficient, badly run organisation that deserves zero respect. The drivers are partly to blame for that, but only partly. I'd say about 50/50 driver greed and management incompetence.
I realise that this is off-topic, but since I still haven't been pointed/linked to a single source of unbiased information in this thread - in fact I don't think anyone's linked to any source of information, meaning everything here is second-hand speculation - that's where I stand at the moment.
EDIT: Sorry max, I didn't notice your comment about my not answering you RE why not all drivers. However I have already answered the question as best I can, several times: I don't know, and I doubt you do either. Since you have an opportunity to talk to the drivers, why not ask them instead of me?
adam