I'm seeing the updated CP values without having trained any of my Pokemon. Looks like the new values are being implemented on all Pokemon now.
Exeggutor is still my biggest poke, though my collection of six big Gengars all got a nice boost. I also had six big Pinsirs, which are all much more impressive now too. On the other hand, my Vileplume and Victreebel both fell in CP, which kinda sucks, because they were starters in my gym team.
Though Beedrill got a nice boost, which means Project Best Bloody Beedrill is still ongoing!
EDIT: I'm reading that Gyarados, Dragonite, and Snorlax all got buffs. But... why? They're already the three most common gym Pokemon around here, how does buffing them help with rebalance?