I just helped a local team and quickly learned that they received an old rev of the gyro board. The "Rate" and "Temp" labels on the PCB's silkscreen were mistakenly swapped. They were measuring temperature instead of rate.
If your PCB isn't labeled as shown as in the gyro schematic (link below) , you received an early rev board with swapped labels and will need to wire to the "Temp" output to actually measure rotation rate. Sorry for the inconvenience.
http://www.usfirst.org/community/frc....aspx?id=11838
Russ