I agree with A-Jay but might add a thought or two.. Vibrating jigs develop their action or movement by shifts in the manner water contacts the blade, develops pressure until the pressure is channeled to one side of the blade or the other. This is the same principal in a billed crankbait. The shift in the pressure or resistance is so rapid in establishes a vibration.
The vibration or rapid shifts in the waters shifting off the blade can be enhanced with a rod that has a slower or delayed reaction to the give and take of the pulsating of water shifting off the bill. Like many others, I like a rod that has the delayed reaction but you don't have to fish an all glass rod to get that benefit. There are graphite rods that have this characteristic. The application of glass and graphite composites has been very successful. Power, lighter weight, sensitivity of graphite in the lower two thirds withe the delayed response of glass in the upper third has been effective.
The give and take reaction of glass and or composite rods ( and some moderate graphite ) has another benefit and that is cushioning or absorbing stress which might lead to bending lighter treble hooks and more importantly tearing the hooks from soft tissue. How you choose to capitalize a delayed reaction or " slower" action is up to the angler. Just my two cents.