Hi Spacecadet:
I was on the third tier at Yale's Waiting list, so I withdrew from there (Silverman said I will have a 'decent' chance). I got accepted to Columbia in May. I had sent a withdrawl letter to Hopkins subsequently (I did not want to deal with the uncertainty anymore), but they apparently did not receive it (I am abroad these days), so I received a shocking acceptance from them yesterday (was on the "upper portion" of the waitlist).
Now that I have an acceptance from Hopkins, my peers/parents/professors/advisors invariably urge me to go to Hopkins.
My "gut feel" still goes with Columbia. I have a couple of days to decide....
Hey, you should probably hear from Yale in a couple of weeks then. Good luck!!!
PS: To answer your question, as of today, I would have chosen Columbia over Hopkins and Yale (purely due to personal choice).