alt Hacker NewsExcept that it wasn't, it's just what "the owner understood from the vendor". But the AAIB measured the Tg of material samples to be about 53 °C, which is very low and strongly suggests it being PLA or PLA-CF.
I wonder if he was erroneously sold a demonstrator part?
Looks like either CF loaded ABS or PLA, the difference is super hard to tell visually but given that they determined that particular temp my bet would be PLA because even PETG would be higher.