Student ability to come back from rough starts, "culture shock" going into a top school, tough grading, etc. are more prevalent at WashU and peer institutions than at lower-tier schools. These factors are inherently tied to the kind of student who attends WashU. You're obviously biased towards straight A's at WashU because you are familiar with the school. I am impressed by straight A's at MIT. No doubt I believe MIT is harder than WashU and you likely believe the opposite. The problem is, all of this is subjective. There are plenty of hard, grade-deflating schools, like I said. Your problem at WashU is by no means unique. Students at UCLA, Berkeley, Hopkins, MIT, etc. all feel it.
Yeah, and there are science majors with those 3.8s at those top grade-deflating schools who get into med school. It is nice to whine about grade deflation but like I said, I think an 18-year old, who is old enough to make the decision to join the military, should be able to come to an informed decision about the next stage of his or her life. Otherwise, why would anyone trust them to make a decision to risk their lives?
Most high schoolers who are applying to and accepted at those top schools are well in tune with grade deflation. I remember applying to WashU long ago. I remember applying to MIT. I remember when it came down to the wire of choosing where to go, grade deflation was a huge factor in my decision. There's no reason to not be informed now with the Internet and resources like College Confidential.