IvyM

I've applied.. No response yet. Haven't reviewed my portfolio either.. 
 
Did they look your portfolio yet? 

I just got back from the visit day where they revealed some stats about this year's admissions. The following include both MS and MS/PhD applications.
~950 applications 224 were sorted into the Admit/Possible Admit pile 181 were admitted (19% acceptance rate) 57 were invited to interview for 5 quarter and 3 year fellowships (6%) The vast majority of people invited will receive the 5 quarter fellowship for the MS before moving into a funded PhD. The MechE department has 5 Stanford Graduate Fellowships to hand out which provide funding and an increased stipend for 3 years. Stanford is only interested in funding students whose eventual goal is a PhD.
All letters will be sent out sometime in mid-March. The takeaway from this is that there are still 124 MS students who have no idea they've been admitted yet. Just wait if you're in this boat.