pfSense with new fibre fttp connection

I’ve just had 100/20 fibre installed. My pfSense box is only giving me 6/.25 but the connection measures at max nominal speeds if I pppoe in to the ONT direct from a laptop. Any ideas what is making pfSense performs so appallingly? I have a vague recollection of setting the interface speeds when it was routing 6/0.25 DSL, but I am damned if I can find that setting anywhere. Many thanks for any input.