Nigeria: What manner of federation is this?

"The 1999 Constitution (as amended) expressly states that 'Nigeria shall be a Federation consisting of States and Federal Capital Territory'. It is, therefore, not in disputea that one of the most enduring constitutional features of Nigeria is the federal system of government, however, the question has always been whether Nigeria is a federation in the true sense of the application of federalism principles and practices?"--Pages 1-2