By "geared down" he's probably talking about dropping one tooth in the front which is a very common gearing change. This will give you better acceleration and lower your theoretical top speed. I say "theoretical" because most bikes are top-speed limited by drag, not gearing. In fact, sometimes this gearing will put you in a better part of the power band and net a higher top speed as well as better acceleration. However, it will cause you to be at higher rpm when cruising. If you do a lot of open road touring you may want to reconsider this kind of gearing change.
Also, if you have an electronic speedo, a gearing change will have it reading incorrectly and you'll want to consider a signal correction box as well.