Not everyone who does shoot promos is untalented, but lets face it, now that Cena has stopped doing them, its become glaringly obvious how untalented he is. Anyone can do em, but they are a great way of hiding piss poor ring skills by diverting attention away from that with a well timed promo!
As for HHH, I dont think he is untalented at all, but I do think he sometimes uses the promos to allow him to not work so hard in the ring. You dont always notice how lazy he can be until he has that odd really good match (like the one he had against HBK on RAW a few years back), and suddenly you realise that every other match he has done in the last few months has been lacklustre!