Exactly. My first real job out of college was due to a referral. Girlfriend's stepdad put in a good word for me a a major engineering firm. I went to the interview open-house and realized quickly the people around me seemed much more accomplished and more knowledgeable about the company and the industry its in. I had some interviews later, they seemed to have gone ok, not awesome but not a disaster. Then the VP of engineering comes up to me and tells me how excited they were to have talked to me. This threw me because it all seemed way out of my league but I didn't see her approach anyone else except for a couple other candidates. I ended up getting an offer a month later. I knew my gf's stepdad definitely put in a good word for me, I just wasn't expecting it to help me that much.
If I tried to get an interview from this company through the job fair at my school, I would have most likely not even gotten a phone interview. The only thing, I haven't told any of my coworkers who referred me. I'm not totally sure how prepared I am for this work and I wouldn't want any poor performance to reflect back onto him.