I bought 2, one black at&t 3G, one white wifi, from the apple website, both are 2,4.
Trust me, the effort you are putting forth to get this new processor isn't worth it. I also own a 64gb vzw 3G without the new chip, and I do not notice a single difference, not in battery life (maybe 30 minutes difference absolute max and only that much when doing processor heavy tasks, like unzipping/decompressing/decrypting a multi-gigabyte file), and most certainly not in heat.
I don't know what those tests were doing, but in average use, unless you have absolutely nothing better to spend your time doing, or that 30 minutes/charge cycle is of dire importance, you are only going to feel like you wasted your time.
As far as any specific model having the chip, I doubt it, unless they felt like excluding vzw for w/e reason.
The 1 hour or more that those tests were saying will only exist if you plan on running their benchmark the entire time, which minimizes display usage and then pushes the processor to its absolute limits. If you plan on actually using your iPad for what it is designed for (using applications, watching movies, browsing the web, really anything other than console commands on a jailbroken device), 20 minutes is what you are going to see.
It's not the processor that drains the battery, it's the display, which didn't change.
And FYI, when I started using my iPad for many hours on end, I also got bad bad headaches, even though I also use electronics for the majority for my day, sort of behind my eyes, but don't worry, they cease after about a week and a half. I drain the iPad battery daily, sometimes recharge and use it even more before night, and I don't get problems any more.
