Muse 2 feedback latency

Hello everyone,
I have a very simple question regarding the feedback latency? Till now, after several attempts to get a real value from the company, I didn’t get any reply. Even in Muse 2 press release if I qoute correctly the feedback is described as “Slight”. Still no number:100,250,500 ms?
I anyone knows please let me know!
All the best!