so the guy the thread opener spoke to is spot on- not the v1 is lovered but just the callout is spoken a second earlier , thats all the secret about this whole discussion.
"Weellllll, we don't really lower V1, we just call it early."
Yes, that might have been the intent, but in practice it's treated as though V1 has been lowered. Captains remove their hand from the TLs at V1-5.