Katie, I had a house built in Florida a couple of years ago. It is concrete block construction, and as Stumpy said every meter or so around the perimeter the block core is filled with concrete and reinforcing steel - the steel extends from the footing all the way to a tie beam that is poured at the top of the wall (about .5M tall). So these walls are extremely strong for when hurricanes hit us. The windows are hurricane resistant (can withstand a piece of framing lumber hitting them at 160 mph) and the roof trusses are connected into the tie beam with straps that are poured into the concrete.
This system, while strong, does not provide much for insulating properties (the blocks are hollow!), and don't meet the energy code of the state. So pressure treated furring strips are attached to the interior walls and foam board insulation is placed on the interior of the blocks to meet the insulation needs. Sheetrock is then added. This also provides a space for all the electrical to be run so there is no need to recess conduit in the wall. The outside of the block is stuccoed, as is the interior of my garage. Almost all houses around me (and there is a massive amount of new construction) are built the same way, although I do see an occasional ICF built house.
I don't think AAC block is common in the US (I had never heard of it before I lived in SE Asia), and not sure it would meet the hurricane strength requirements if the cores cannot have the reinforcing steel installed to tie the walls from top to bottom.