Bench is not the only indicator of strength. But yes, I would have to think Scott is capable of a 600lb bench press. I have seen him in the gym more than once, and he is like a bulldozer. He reminds me a bit of Animal, who had a 600+ bench press.
The thing that impressed me was his overhead military presses with 405 for reps. Is Ronnie really that strong too? Maybe so, but I haven't heard that Ronnie is among the strongest of bodybuilders. I thought Tom Prince was the frontrunner for that title? Or maybe Kovacs (unless he is all hype?)
In any event, Steiner is stupid strong. I think we can all agree on that point, yes?