By and large I agree with the majority on this one. While a limiter and/or compressor is acceptable to place on your master bus, I wouldn't engage it until my mix was well on it's way to gelling together.
Even the MiLaR method suggests not engaging this until later in the mix, just so you're working with the actual recorded sounds to make your important initial mix adjustments.
Taking 60 tracks of guitar and making them the nu-metal sounding wall of guitars is a mixing decision that requires more ingredients than just slappin' Boost on your master and laying them on thick (I think, I don't write nu-metal really). I mean, you COULD do it, but I would think starting a mix with a limiter and/or compressor engaged is like watching an IMAX movie with reading glasses on.
Most modern mixing wisdom, regardless of what style is veers off into, begins with getting a very honest and organic sense of the sounds and the stage you're working with. No effects, faders up equally at first, not over-using the solo button, etc. I wouldn't think having a limiter turned on would help nearly as much as it would frustrate if you decide later on to take a part out or try a major tweak.