Not sure if someone has posted this yet, but honda uploaded a video of the Civic Si's global debut on the 15th. Near the end of the video, he said something about a press conference today? Maybe that's when they'll release the specs.
Another forum was there for the Q and A after the reveal. 90% of their answers about anything technical were "to be released at a later date" i feel like if that "later date" was a day after the fact, they would've said "in a day at the press event" so i wouldn't hold my breath sadly.