Something you seem to be missing is maybe Apple will push back the release not "for the sake of Verizon", but because they simply need/want to push back the release.
Model updates get delayed all the time, for all sorts of reasons. Yes, Apple has had a very good track record with the iPhone, but we're also only a few revisions in. There's no reason to expect the same product cycle to continue indefinitely.
As Apple has taught us, they release products when they're ready too, not on some preset schedule. Just look at the Mac mini, which went years without an update.
(Granted, cell phones are a bit different, since users are on a fixed upgrade cycle, but still...)
Not that I necessarily expect them to delay the release, but it's certainly possible, and not only to appease Verizon.