It’s not a speed, it’s an acceleration. And it is probably the same as the Speed of Gravity.
If E=MC^2, and if Gravity (G) is equal to the Energy of a Mass (i.e. G=E/M), then G=C^2.
Any bets that “spooky action at a distance” turns out to also be the acceleration (not speed!) C^2?!
34.6 trillion miles a second! Wow I want one. lol