That's a good question. About a year and a half ago I compiled a large anthology of the history of logic and computation, and I remembered coming across that during my research. What I've been able to find now is the following section from Hodge's Turing biography (p 507-8 in the edition I have):

> Wiener regarded Alan as a cybernetician, and indeed ‘cybernetics’ came close to giving a name to the range of concerns that had long gripped him, which the war had given him an opportunity to develop, and which did not fit into any existing academic category. In spring 1947... Wiener had been able to ‘talk over the fundamental ideas of cybernetics with Mr Turing,’ as he explained in the introduction to his book... Wiener had an empire-building tendency which rendered almost every department of human endeavour into a branch of cybernetics... Wiener delivered with awesome solemnity some pretty transient suggestions, to the general effect that solutions to fundamental problems in psychology lay just around the corner, rather than putting them at least fifty years in the future. Thus in Cybernetics it was seriously suggested that McCulloch and Pitts had solved the problem of how the brain performed visual pattern recognition. The cybernetic movement was rather liable to such over-optimistic stabs in the dark.

So if this passage is indeed the source of my recollection, while very poor and perhaps exaggerated, I think it's pretty true to the spirit...