Not Yet
They are not...and as much as I hate to say it, neither are full electrics. The reason they aren't worth the extra money is those damned batteries: by the time your savings equal the initial "green charge" it's time to replace your battery pack. Those things are not cheap. If people had to replace the engine in their gas or diesel vehicles every 3 years then, yes, the hybrid and full electric would be worth the extra initial outlay. Until the energy storage situation improves dramatically, they will not be worth it.