The best we have ever done was 40 minutes to connect from EIS-SJU. This was with ZERO lines, walking FAST, and just a carry-on duffle. It will take almost 15 minutes to walk from the plane to customs.

Agree, it is a "illegal" itinerary.

Add to that, I have seen AA close the doors and deny entry 15 minutes before.

The last time we went, we did get our AA tickets from EIS Seaborne, but they did not have the TSA-Pre checkmark. Without TSA-Pre, we would not have made our connection.