Discover says my credit score is 767?

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I just recently got a student credit card from Discover so I can start building my credit. On the back of the first page it says Your Credit Score: 767 (source: TransUnion). I'm only 18 and the only time I had a credit card is when I was an authorized user on my dad's Bank of America account. I assumed it was just sample credit score or something like that but no where does it say example or sample or anything. Is this really my credit score?

Additional Details

It says FICO: 767

I talked to someone from Discover and they said that is indeed my actual credit score. How weird.. thanks for everyone's help.

Discover says my credit score is 767?