80 million Turkish speakers outside of Turkey sounds like a pretty extreme guess and merely 55 million in Turkey itself sounds way too low. First off, how many monolingual speakers speak a language other than Turkish? Not all that many, one would imagine. I know for a fact that I've met many Kurds in Sweden that barely speak Kurdish, but speak Turkish fluently. And I was under the impression that the figure of Turks in Germany was closer to 1 million (which is still a lot). I say we should bring the estimates down to very conservative figures unless someone provides reliable source. To me the total 100+ million figure sounds very high. 
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