Per contra, when we sailed the transatlantic to San Juan with Disney in 2014 the queues for Homeland Security were absolutely the worst we have ever seen. It is difficult to recall the nightmare now but I seem to remember we stood in line for about two hours for passport control. The Disney crew were going frantic. Many flights were missed, I think. Fortunately, our flight left at 1.45pm and we were OK. Perhaps San Juan has sorted itself out now, but early flights are always a risk.