Most commercial bathrooms are built on the heavier side now to accommodate the fat and the handicapped even though they might not be designated as official handicapped stalls. The partitions have been a part of modern public US bathroom design for a long time now, usually sheet steel, but you might see pretty wooden ones in older buildings.
Older commercial and residential toilets were indeed powerful, but there were water conservation laws put in during the mid 90's that now limit the amount flushing capacity on newer toilets. It's still something we complain about, and some even import or salvage older style ones for use.