a minor point of history
It's not a minor point of history Genghis, it's a major point, and Captain Brown made a major point of it in his book on the M.52, and in his presentations. Any thing you see about the X-1 has the claim, based on his assertions. It's not a squabble between pedants, it's historical fact, and was a misrepresentation by Captain Brown, and the only reason I can imagine why is as I posted re two nations separated by a common language.
Perhaps you missed where I wrote "a great man and pilot". I recognise his contributions, but the accolade "greatest" is up for debate. Scott Crossfield, Neil Armstrong, and many others could be up for the vote, particularly those that gave their lives in the furtherance of researching the limits, such as George Welch, Carl Kincheloe and Milburn Apt.