College Supplement Essay Typo

[skieurope]

So, does this make a big difference in terms of my application?

No. And for reassurance, you can check the 25 million other threads asking the exact same question, including:
http://talk.collegeconfidential.com/what-my-chances/470497-clam-fart-oh-my-god-what-did-i-do-p1.html