A large number of papers have appeared in recent years on the use of generalized row sums and generalized column sums in the extended version of the Rosenbrock Nyquist Array design scheme for multivariable systems. Some of the authors claim that their results using these row/ column sums encompass similar results using the Hadamard property of irreducible complex matrices. It is the purpose of this note to indicate that such claims are false. On the contrary, all these results are direct consequences of the Hadamard property and can be deduced from standard results in M-matrix theory.