Board Thread:Off-Topic Discussion/@comment-25147000-20141019023013/@comment-24464194-20141126023437

"Okay, I did. I'd only just briefly heard of vocaloid, so I thought Miku was the only vocaloid and I thought producers were hired by vocaloid to make her songs (I don't know where that came from. I guess I just thought it made sense in my 11-year-old mind.) After learning of the Kagamines, I dug into it because I was interested, but I really doubt many other people would have done what I did."

THIS. (But I knew about Iroha AND miku before the others.)