anxious2011

Having a "good feeling" about a particular school you are keen on(although you recognize this is completely irrational), only to realize through the gradcafe survey that you haven't gotten an interview invite , then going on to develop a "good feeling" about another school

Fuzzylogician is exactly right. You need to showcase your ability to organize detailed support of an argument in your writing sample. The SOP has the big ideas, but your writing samples shows that you're able to translate those ideas into well researched pieces of writing on a realistic scale.