I would think it depends a several factors. Altitude and time are two. At higher altitudes (over 5000 ft, or so), an 80 mph wind, while still impressive, doesn't "hit" things as hard. Why? Force=mass X velocity. Air is thinner at higher altitudes; hence less mass. Figured this out after living in Wyoming for seven years and couldn't figure out why 60-80 mph winds didn't blow everything to Nebraska. As for time, if you're worried about thunderstorm gusts, then you'd have to de-rig and/or pull the boat every time you use it. Who knows when a thunderstorm is going to pass by? But, it's for a short period of time. If that's what you're worried about, then I'd take of the boom, secure everything else real well (use snubber lines on the boom) and hope it blows by real fast. Our boat (260) rode out the outer winds of Ike in 2008. Passed 300 mi south, but still brought 30-40knt gusts for two days. Couldn't pull the boat because the tidal surge flooded the boat ramp. Rigging was find. Just lost a cleat.
In the end, a boat is just a boat (even though we name the and have an inexplicable affection for them). Take prudent, but not extravagant precaution, and let the insurance console you if you get it wrong.
