Economically, the majority of states are worse off if you compare them to where they were in the two decades prior to independence.
Angola and Mozambique, prior to their release from Portuguese rule had developing and diversifying economies with help from Portugal. The help from Portugal, of course, also had benefits for the people of Portugal proper; the construction of railway systems enabled Western capitalists to explore and invest in the mineral-rich interior of Angola.
Mozambique, on the other hand, became somewhat of a tourist destination for Portuguese, Rhodesians, South Africans, and other interested Europeans; as many as half a million Rhodesians and South Africans alone visited Mozambique for pleasure annually.
In both cases, the "independence" (though, in some cases, they acted as proxies for the Soviet Union, communist China, and Zaire) movements were largely politically and ethnically motivated as opposed to the economic conditions that existed on the ground at that time.
I'll expand on this later, since I've got to go warm up the car.
