I just saw this on Josh Bryant's forum:
"I think grip tests are sort of a joke for the most part because of all of the guys that bench 300 but can close the number 3. However, if it is to be contested I will get good at it." (I think he meant can't bench 300)
Be sure to work your whole body. Training is grip is fun, but Popeye looks like a deformed concentration camp victim ;)
Josh also has credentials, his raw bench is on of the best on the planet.