If someone buys a Dell instead of biulding their own, should they really be doing stuff like BSEL mods? Will they have the resources and tools necessary to make it happen? If they can't put together their own system, should they be voiding their warranty, tearing apart their system and risking permanent damage to the components inside the case?
Some of the software mentioned may give that Dell some limited overclockability, but I don't know if there would be enough overhead to make it all worthwhile.