What exactly is incredible about that screenshot? Seems to me that it's 6 hours of screen on time . . basically . . If you look at the bottom graph you have a history of 15h44m, and in that timeframe you see these long plateaus on the blue graph where when you look below them at the bottom the screen/wifi bars indicate that both screen and Wifi were off during those times too. Essentially during those plateaus the tablet basically completely in deep sleep which is why they're so flat.
Edit: The difficult thing about reading these charts is that they don't give a complete idea of what the usage was like during the steep downward trends where battery is draining rapidly. On cell phone charts sometimes you'll see cellular signal strength indicated as low/weak and the drain will take a nose dive due to increased power requirements. On this chart you see screen is on quite a bit and wifi is on a lot as well, just not the full 15 hours. What we dont see is how much processing is being done and by what application. For that I had to go into the other thread you linked and pull up the application list associated with the battery drain chart. From that I summized that the reason battery life is so good for this person is they are not doing anything really intensive. The top ranked applications are all things that wouldn't be pushing CPU speed to max power. Things like Google Play Newstand (reading application), Facebook, Tapatalk, Chrome, and Messenger are all things where you won't see it running at full clip for an hour straight. Without a CPU state report for the same sample duration there's no way to know just how far these applications pushed CPU speeds up and for how longh though so we'll never know. If the YouTube application was ranked #1 on that chart, he still had seen 6 hours of screen on time and had the tablet on battery for 15 hours then I'd say thats great battery life. Again though, I could sit in youtube for 6 hours just tapping the screen without playing anything and make it the top ranked application in battery stats without pushing CPU very hard (though I'd run out of patiences after several minutes LOL!). Point is, there's TONS of variables.
If I get 1% per hour burn rate in deep sleep I can basically unplug my Note Pro at a full charge while it's powered on, not touch it and expect it to be at 50% after 2 full days. Not very amazing IMO.
No . . to me the critical thing about battery life besides maximum drain rate at full brightness is how light on drain rate the device is when in deep sleep. Kernel has a lot to do with this but it's irrelevant for those who don't root (and those of us who have are still waiting for custom kernel development too so its not going to be any better than it is now anyway). That said, the stock kernel seems to be fairly aggressive on power consumption already since it is so good in standby.
I'm with mickeylittle777, I'm the type to charge frequently since I too have an office job. For me the most critical battery life measure I worry about is standby drain since I view it as mostly a waste of power when i'm not using the device actively. If I know I'll be away from power for a while I'll bring my Anker Astro3 along with me and I'll be fine.
I often wonder if those who worry a lot about battery life are the type that do not top of charge and instead charge once every couple of days. I've always been of the opinion that waiting until the battery is low before charging as opposed to topping off nightly really isn't going to benefit me much at all in terms of lifespan of the battery. Charging from lower battery levels only puts the battery through a higher temperature charging cycle for longer periods of time throughout the life of the device. This is all subjective opinion though but charging every night has worked for me on all of the devices I've had so thats what I'll continue to do. Besides, I'm always near a power source at least once a day so why not take advantage of it instead of being sorry I didnt when my battery is low on the go.