Update: It turns out that my sister had her S5 on battery saver mode so that's why it was stuttering all crazy. I disabled it and it runs smooth, but it still lags to open things like the Recent apps.
Yes, it stutters like crazy, especially in the homescreen and app drawer. It's unbelievable. It stutters more than an S4. It's just not a 60 FPS experience.
And opening Recent apps is slow. And I thought Touchwiz lag was overrated.
Motorola has confirmed that they are skipping 4.4.3 and going straight to 4.4.4. for Boost Mobile Moto G. It is a question of when, not if.
Speaking of L, it is also coming to the Moto G.