http://www.tenouk.com/learningretentionrate.html
There's something to be said for communicating. In engineering and science if you ever hope to interface with people outside of your field you'll find that you need to be able to not just understand, but share your ideas with other people that might not share your grasp or interest in the details.
Of course, rushing your education has much the same consequences as rushing what you teach. Life is about balance and it's a pretty much a full time job to maintain that balance.
The very first time I mentored I was just finishing up my time as a full time student. At the time the most positive thing I had in my life beyond my family and friends was being a mentor. I never bothered to return to school as a full time student and I probably will not, though I continue my education with classes here and there. This being communicated I have been quite successful in my career both as a business person and as an employee.
Seek the balance that's right for you. The strength of all communities, including FIRST, is the diversity of the members.