The hexagonal clouds shapes that this online story discusses are real, but are not directly associated with microbursts.
Such cloud formations are caused by differential temperatures between the ocean water and the atmosphere, and can occur in many places across the world.
The pictures used in the online article are actually associated with clouds forming over the islands located in this part of the Atlantic.
So while microbursts could be responsible for some of the mysterious disappearances in the Bermuda Triangle, there are no more microbursts in this area compared to the Plains states in the United States.