Meters won't peak while recording...EVER!!?!??

Hello there,

I am curious why whenever I am recording into pt I can never seem to clip the meter in the pt mixer. Could this be something to do with Mixcontrol (virtual mixer software which comes with the Focusrite saffire 56 interface)? When I look at the Mixcontrol virtual mixer, I can see that loud microphones WILL infact clip into the red, however protools seems to not consider the overdriven distortion clipping.
Has anyone else experienced this issue?

Thanks in advance :-)