According to a thread over at XDA, the Sprint N6 is having a lot of issues so maybe it does have to do with the CDMA network.
I've stopped caring at this point. Yes, it is the phone I want (I am a fan of Nexus devices) but I'm not willing to switch carriers yet, not because I love Verizon just for the convenience factor. If Sprint wasn't having so many issues I probably would go to them (before these past 3.5 years with Verizon I used Virgin throw away phones and they were great in the area I live in, as good or better reception than T-mobile). This not releasing the Nexus 5 or 6 added to the fact that Edge is now a 75% payoff (which makes it a bad investment really) does suck but my G2 is such a future proof phone I could go another six months with no problems.