Looking at the information for the Dublin Airport there seems to be a lounge in Terminal 2 (where we will be departing from). If we opted for the CBP pre-clearance there appears to be a separate one known as "The 51st&Green Lounge". This is also what is listed on the American Airlines website for their lounge. Are they the same? The pre-clearance one sounds maybe nicer and that works well for us it seems but we will be there for a a number of hours so want to explore my options (pre-clearance seems like a nice to have, we have Global Entry and it usually goes pretty fast in the US).
I know it isn't summer yet with more travel - but what are people's experience in time and ease of the pre-clearance? Just like going through TSA/Global Entry in the US but perhaps with nicer accents?