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Connecting is not usually a big deal, as long as your first flight is on time. When you check in for your first segment, you are checked in for the entire flight, so the airline is not waiting to see if you check in.

FLL is a smaller airport, so I can't imagine that it would take more than 10 minutes or so to go from your arrival gate to your departure gate, especially if it's the same airline (airlines tend to have adjacent gates).

There are only a few airports in the USA that are bad for connections. Generally, once you are in the secure area at your initial airport, you stay in it for the duration, so you don't have to go through the time-consuming security line more than once. Notable exceptions are Miami and Newark.

SR

Question, I'm flying through Miami for the first time on Aug. 14, I hope you're not saying I have to go through security in Detroit and also in Miami before I get on my connection.

In most cases yes. There is a connector, that is behind the security check point, that connect some but not all concourses.

I'm flying American all the way through both ways, hope I don't have to go through twice. Ironically, I could have flown either Delta or US Airways, but thought their connections would be too tight, so switched to AA.