I will revisit this and say that there is the very real possibility (dare I say probability) that Garemlin is 100% correct. The actual confidentiality agreement was "agreed to" when you sign up for the MFN "Being signed up for MFN is the only way to get to be in a soak or other testing.", and given that you DO agree to the confidentiality then, it probably covers the surveys that "may" have gone out late this afternoon.
So I will recant my earlier question of whether the survey was included in the confidentiality agreement and instead stand beside Garemlin by saying that ANY discussion of the items mentioned above in Garemlin's post will put you at risk of being either passed up for selection, or once selected can cause you to be de-selected from the soak group. Furthermore, even if you do get through this "alleged" impending soak test, if they find you had discussed it prior, during or after, you also stand the risk of not being selected for any future soak tests.