There's no rule
that says that you HAVE to get to 66°, or to 65°, or whatever. It really depends on your boat and what you are comfortable with.
Most people are not going to be comfortable close hauled for days at a time, but something a bit more on the wind than a beam reach (again, depending on you and your boat) might be perfectly fine. So if you leave Jacksonville
and can make it east to 70° of longitude then your course to the USVI would be about 160° true. That puts you in the neighborhood of 70° off the prevailing easterly wind. Not quite a beam reach, but fairly close, and perhaps very comfortable.
The point is that the route you choose needs to be based on more than just what someone else--a different sailor in a different boat--thought worked best for them. You need to know your comfort zone, how you sail, and how your boat handles. And then you need to decide for yourself what is going to work best.