Did you successfully breastfeed twins?

My plan is to breastfeed our twin boys when they arrive in 15 weeks or less. My OB is supportive of breastfeeding in general, but he also mentioned that only 30-40% of twin moms can successfully EXCLUSIVELY breastfeed their twins, and that most twin moms have to use formula to feed their babies. I know that there is nothing wrong with formula feeding babies, but it is not what I had dreamed to do. I am feeling discouraged that I might not be able to nurse my sons like I had planned. I would LOVE to hear your story of how you SUCCESSFULLY breastfed twins for several months to a year.