It does seem like a long time, but think of the last three years of your life; gone by pretty fast, eh? Also, this gives you time to get used to and enjoy each new size, and even give you an opportunity to change your goal size. What if you get to 2g and absolutely fall in love with it and decide to stay there - If you skipped that size or didn't give yourself enough time to get used to it you wouldn't know. Also, while all your friends are at their goal sizes and you're still just getting there, you can look and see how beautiful and healthy your lobes are compared to their blown out ugly cat ass lobes.
It's actually a very enjoyable journey even though it takes so long, so enjoy the ride and get to know your body and yourself better.