As some pointed out at the time of Gary's purple period, this wasn't really accurate. Because, although vocoders and talkboxes were used in electronic music in the late 70s and early 80s, they were the preserve of either Germans (Kraftwerk etc.), American R&B acts (notably Zapp) and rock acts like Peter Frampton and, later, Neil Young. They were, almost without exception, never used by the sort of acts that Gary LeStrange was celebrating/lampooning. Instead, acts like Soft Cell and The Human League gained much of their effect precisely because of the contrast between hard electronics and the frailties of the (Northern) male voice.
I was reminded of this when I watched LCD Soundsystem's recent performance on Later.
James Murphy's straining voice and demeanour exactly replicate the awkwardness of early British electronic music. And in my book, that's a compliment. I'm sure the effect is entirely deliberate. See if you agree below.