Prior to Clojure, my primary languages were Ruby and Erlang. Where Clojure or Java libraries are available, Clojure is typically a functional superset of Ruby. Blocks are used as weak macros, that sort of thing. Erlang/OTP is pretty unique in my experience; while actor models are common in various languages, nothing comes close to OTP's treatment of failure modes, upgrades, and distribution. I also miss Erlang's pattern matching, though Clojure's destructuring bind is sufficient for many cases.
... so... you agree with me, that having to choose a single primary language doesn't work. The question was both worded quite explicitly to force you to choose a single language, and if you add up all of the percentages you can tell that the original form actually required only a single answer. My feedback was "people often don't have a single answer to this question", and after you spent multiple paragraphs attempting to claim I was wrong, when I asked you to actually tell me how you'd have answered the question, you came back with two answers. The question either needs to be reworded to allow for multiple answers or it needs to be reworded (in the way I attempted to provide an actual example of, putting in actual effort on my part to help future implementations of this survey) to help the person answering choose a single one.
Choosing a single primary language does work because it's an informal web survey about a programming language. It's not a contract or a test of loyalty/zealotry. Your position here seems like getting upset when asked what your favorite sandwich is.
I am someone who is interested in Clojure trying to learn something from a survey that was posted, and I'm providing constructive feedback (explicitly constructive, as I went out of my way to carefully come up with an improved wording that could be used for one of the questions) to further that goal. To help demonstrate that the question was confusing, I asked someone here to answer it, and he came up with multiple answers to the question, which was the very way I claimed that the question failed, as the question only allowed a single answer. I don't care about "contracts" or "loyalty/zealotry": I care about trying to come up with an improved survey that has answers that mean something. I'm "sorry" that no one else does, and that they would rather type long replies about how much they love Clojure than discuss issues in question design on a survey... whatever.
I answered "Ruby" on the survey without question: in my case, it has significantly broader applicability than Erlang.
In more general terms: no, I don't see this as a critical methodological error. Could it be "Pick your top n"? Sure, might be useful. Yet, I've never met a programmer who had trouble with "What's your [primary|favorite] language?", and the survey made it clear what to do in cases where more than one option applied: pick one, and don't worry too much. Survey design is always a balance between specificity and nuance, and I think in this case he made an OK call.
