It looks like a longer lens from further away is "compressing" the space somewhat, but how much deeper in space would you estimate that softbox is than the people and table are?

I think it's gonna be really hard to tell, cuz you know they edited the crap outta this picture first anyway... but based on the shadows on the face, I'd say it's definitely behind them, but not really far... 3-4 feet?

Vince's face is lighter, even thought the light pattern on the wall shows that the brightest end of the light means he should be darker... I guess they enhanced him cuz, "Hey! Vince Vaughn!". So, I think, like I said, gonna be hard to know...