The 110 seems high, but considering you get a free boost with the expansion and the fact that 1 - 110 takes far, FAR less time than 1 - 60 did back when this game came out, it's fine.
Yes, it seems like a lot, but it really isn't. When you can get in and easily knock out a few levels in an hour early on, you realize just how much 110 isn't hard to achieve.