Jason, are you saying you have seen stock factory gears wear? I have not seen factory stuff show any extreme wear--just a shinny spot. Assuming the after market cast rollers have the oil hole @ the correct angle --hole size and such--I don't forsee any wear problems. I don't know how long they have been in service--time will tell--didn't take long for the econo roller to show how good they were. I have not heard any bad news on the latest cast roller altho I wonder how much spring pressure they will withstand.
Haven't seen a stock cam in years. Aftermarket cams I've seen wear at various levels.