At least the Bulldog didn't need to be flicked to roll pretty well! As did the Chipmunk - it just lacked enough power.
The only Firefly I flew was the T67A - dreadful roll rate and I'm told the Plastic Spastic isn't any better. Hence both Firefly and Das Teutor have to be abused by flicking to roll quickly. Which is a bit pointless since no other service aeroplane is cleared for such manoeuvres.