Does anyone know if aiming down the iron sights needs to be toggled on or off or will it just be holding in say L1? From what I can remember of crysis you needed to click the mouse button to use the iron sights then click again to come out.

i'm sure there'll be an option to choose if it's toggle zoom or hold for zoom.

Any PC game that I've played except Borderlands is default toggle zoom. I'm betting that there's gonna be an option but the PC version will likely be toggle and 360/PS3 will be hold. (By default).

Most likely, the Pc gamers will get options. The console gamers, a toggle to adjust accordingly. Good luck

Let's hope so, it's not a huge issue anyway.