To be fair, it's possible they received their review units early. I reviewed video games 20 years ago and often received a copy of a new game a week before its retail release.
Also in fairness, I respect Antonio Meze's desire to tune his headphones for maximum enjoyment of music, not to satisfy measurement geeks. So, I fully expect the ASR crowd to SHRED the 109 Pro's even though I anticipate they will sound very good with many types of music. Meze emphasizes the experience, not the nitty-gritty of the frequency curve, which is cool.
I'm considering a purchase of these or the LCD-X 2021 in the near future. I was reading the thread about the LCD-X at ASR, and there were nearly two pages dedicated to debates of minute tweaks of bass shelves and other EQ matters. To each their own, but it was beyond tedious -- exhausting.
Eager for YOUR feedback on the 109s!