I help at a fire academy in PA, and I can thankfully say at least we are teaching the latest from NIST, which recommends NOT applying PPV to a building fire. The material says that's just adding ventilation to a ventilation limited fire, accelerating flashover.

Also there's tons of discussion and practice around controlling doors and always keeping them closed to suffocate and contain the fire as much as possible. I've been pretty pleased with seeing that taught, although a lot of places haven't seemed to adopt these new recommended methods.