Moto X 4.4 update speed

Nexus 4 user here. Love the phone and would totally rock it for another 6-12 months if the battery life didn't suck so hard. N5 battery life should be good too if it's anything like the LG G2, but the Moto X really appeals to me for for the awesome voice/driving features (I live in LA, looootta driving) plus battery life. I wonder how fast the Moto X will get 4.4, think that'll really decide whether I pull the trigger on one or not. Obviously this is wondering about unlocked/developer models, as carriers will delay any updates till forever.