What do you think of this age difference...too large?

I am currently in a relationship with a male who is about 8 years older than me. I am a soon to be 20 year old female in college and am seeing a 27 year old. When we met we didn't know how old each other were and hit it off right away. We have a great connection and unbelievable chemistry. We have also been seeing each other for about a month as well. Now I don't normally care what other people think about me or who i ociate myself with, but I just wanted a few opinions on the age difference. It honestly does not bother either of us and we quite often joke about it. However, my dad is not exactly ecstatic about the situation LOL. So thank you in advance for your opinions!