I have used JetBlue-Silver codeshare flights nearly 2 dozen times, and have never had a delay that caused me to miss a connection. I know it does happen, and when it does it can be extremely disruptive. The last two trips we have used the AA flight thru Miami on the way down, and the JetBlue-Silver flight on the way home. The point I am making is that your odds are good that you will not have MIDiver's experience.

As others on this board advocate, the only way to mitigate this risk is to opt for the ferry and flights through STT. For me, it is worth the risk for the very high probability that I can be on Tortola before noon (coming from MCO) with only one connection.