I don't think pointing to surveys showing few Clojure users came from Haskell/ML, is sufficient to disprove Yegge's assertion. If a language's designers came from camp A, yet the majority of users came from camp B, that does not mean the language is not strongly influenced by camp A.
That's a fair point, but it was an attempt to inject actual facts into a conversation full of generalities. What the survey does suggest is a lot of people who used "non-conservative" languages in the past are now using Clojure. Maybe they all decided they wanted a "conservative" language, or maybe they think Clojure is "non-conservative". Or maybe these labels don't have much meaning after all.
I've never used Haskell, so I can't speak the specifics of the observation. But I don't believe much can be inferred from the observation alone.