Allan78,
You wrote: "I couldn't submit my application for Columbia by Jan 9th since I couldn't get a quality essay done. Am I correct in assuming I can still submit although it will be processed much later?"
Yes, you can absolutely still submit your application! January 9 was the application deadline for those who wished to be considered for fellowships. Our final deadlines can be found here: http://www0.gsb.columbia.edu/mba/admissions/options
For international students, our final deadline is March 3, and for U.S. citizens and permanent residents, our final deadline is April 16. You are guaranteed a decision or an invitation to interview within twelve weeks of the date your application goes under review.
Hope this helps,
Christina
For information, see link: http://forums.businessweek.com/n/pfx/forum.aspx?tsn=3479&nav=messages&webtag=bw-bschools&tid=57996