I noticed VZW data was quite a bit slower than At&t data. So what.
Slow data beats no data.
One of my most frequently used apps is "Mark the Spot". I get a text message from At&t every time MTS manages to get through and report a dropped call, slow data, no data, failed call attempt, etc. That thread is the longest SMS thread on my phone.
My phone works relatively well, but I can think of a half dozen situations in the last 90 days where I needed to talk to somebody and my iPhone could not get or keep a signal. Luckily I had my work issued Verizon phone along most of those times and I was able to finish the conversation on that thing.
If no Verizon iPhone comes out tomorrow, the dropped calls aren't all that bad and I'll do just fine. But if one does come out tomorrow, the clock starts ticking for me to switch back.