Well, thats my personal view. I suspect thats how lots of people feel too, given it has not seen any major adoption despite being relentlessly hyped for last couple of years[1].
Also, F# is already in top 20 with relatively little fanfare.
Nor is Clojure particularly aimed at the TIOBE audience. So they're both pretty useless metrics. But it is disingenuous to say Clojure has reached a mass adoption when it's one of the most popular languages on an OSS site. That it said not popular 'in the enterprise' or 'in the business world' then I'd agree.
There's some selection bias here. Github will promote languages that are classically open source friendly - or have a heritage in open source. Languages like Ruby, Javascript and Java will naturally feature higher in such popularity shootouts.
This may not be the case in the world of enterprise, closed-source software.
Also, F# is already in top 20 with relatively little fanfare.
http://www.tiobe.com/index.php/content/paperinfo/tpci/index....