Everyone who acts like a 315+ bench and 405+ squat is some common thing either exclusively goes to small gyms that cater to PL and BB, or is full of shit. It's a rare thing in a general-public gym.
I trained in a gym with Jeff King,Richard Roy,Chris Aceto.Matt Dufresne,Arthur Prince, (Google them,they were great) and tons of national and international competitors,as well as state and regional guys........also great powerlifters and 3 world arm wrestling champions.....I know you`re correct, but seeing huge lifts in this gym was commonplace.
When I left my basement gym and joined the YMCA (no other gyms back in those days) a guy named Carlton Snitkin was squatting well over 800 pounds (Google him),and one of my mentors John Pezzote weighed 265 and did a 505 bench with a pause,650 squat in a contest and a 650 deadlift.......he could also do 5 dips with two 100 pound dumbells hanging on a belt from his waist.
Great times,not like the faggy gyms of today........everyone was serious and hardcore.