As far as a semi-auto being faster than a pump: totally not true. I have a Remington 11-87 and my buddy has an 870. He can fire just as fast or faster than me.
Weatherby Vanguard in 7mm Rem Mag
Remington Model 572 Pumpmaster
Remington Model 11-87 12 guage
Remington Model 870 Express 12 Gauge w/18.5 in. barrel
And plenty of ammo for all of them