I am with oxford blue on this one.
As an ex oats instructor and an airline pilot there are occassions when you have to stick your head above the parapit and say what you think-actually quite often!
From my experience most are readily happy to accept comment,critisism as long as it is constructive, and so far it hasn't backfired on me.
Please bear in mind that OATS is training you for a career in the airlines and good CRM would dictate the need to speak up-would you want to be the one critisesed in the accident report as a quiet FO who failed to speak up to a dominent captain-There are plenty of examples that you will run accross at your time at oxford, the teneriffe accident being a classic.
We are all professionals or training to be and you must learn the requirements to be able to speak to those percieved to be in authority-In my experience of oxford they won't think any the worse of you. Apologies for the spelling.