My buddy went and fully setup a Hoyt Vipertec...ready to hunt with and put it throught the chrono.
A fully set up bow is not to IBO specs. Ibo specs are useful to get an idea of how diffrent bows proform with the same variables. Adding a peep sight, string loop, kisser button, crimp on nocking points, string scliencer all effect the speed of the bow.
IBO is useful but for for figuring out what a hunting set up speed will be.