YES!!! Finally a Convert 
Yes those HID Kit/Chinese bulbs have less life because the quantity and mixture of salts in the HID bulbs are not researched thoroughly like big companies such as Phillips,Osram etc.
HID Bulbs by the above companies however last far longer than Halogens(sometimes outlasting the life of the car)
@qwerty: Sorry bro, I think you better go with narva's.