Just for an idea of the timeline I experienced...
-It took ~2 months for me to be "complete" after I submitted my secondary
-It took ~1.5 months for me to be invited to interview after being marked complete
Even then, I remember there being plenty of people who were complete around the same time or before me who still had not heard, and I don't think that meant anything.
Moral of the story: be patient. The admissions process is slow and agonizing. I seem to recall quite a few people having a similar discussion as above last year (i.e., that they hadn't heard from Einstein in a long time). Maybe their admissions process is a bit slower than some schools, but find some comfort in the fact that their interview season is a long one, and you could hear from them at any point along the way.