tswum says: "it ain't never no word"
If it were, that 15-letter "word" would shatter not one but two records*, which is too much of a coincidence to be credible. Rubrick has to be correct: an attempt by someone to coin a new word using letters once in alphabetical order
Dunno how the selection was made, but: TEd says it almost matches "the relative values of the various tiles for scoring purposes in scrabble®" (Faldage says the match is imperfect: "Your boundaries are a little sloppy there")
Bet the "selection rule", whatever it is, produced that result. That is, you'd get such a result by starting with a brief phrase, alphabetizing the letters, and eliminating duplicate letters. It would be a close but imperfect match to the letters' relative frequency of usage.
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*1) Longest word with all letters in alphabetic order (the longest I know of is 7 [with a doubled letter] or 5 [without])
2) Longest word with no letter occurring twice or more (the longest I know of is 11)
