Well in my case I think I applied the 1/5 and go rejected mid February. Took about 5 weeks for them to get back to me.
I had 750 GMAT, 3.51 GPA in Dual degree in Engineer at top university for engineering, speak a few different languages, and what I thought were great essays as well (doesnt everyone?). I will admit one of my letters of rec was probably weak, the person didn't even look at it until the day it was due and I imagine he just threw something out there(Engineers are like that).
I think business schools can be real subjective as to whether or not you get that interview invite. Just depends if they have hit your type of quota ( In my case an engineer), whether the person reading likes your essays, and whether they think you are a good fit.
After I got dinged at Columbia, I got invites at other schools. You really just never know what will happen.
Hang in there are dont worry about what you see from other peoples stats online.