My experience with the Thunderbolt battery issues is that the battery screen doesn't account for all power usage. It may give some clues, particularly when you see a rogue app in the list, but I don't think it actually monitors the power usage of the radios.
For instance, when I had WiFi enabled without being near one of my networks, the WiFi radio would suck battery at two to three times the normal rate while searching for a connection. If I disabled WiFi, the phone returned to sipping battery. However, this extra battery guzzling by the WiFi radio never showed up in the battery screen.
Likewise, sometimes when I was deep inside a building, the LTE/CDMA radio would go nuts and start drawing tons of power. The phone would get uncomfortably hot in my pocket. Yet I still didn't see a difference in the percentages on the battery screen.
I think the battery screen is really a record of what the processor has been doing; which apps its been running and so forth. While this will generally correlate to the battery usage, particularly when the phone is actively used, I don't think it's very accurate for a lightly used phone where most of the battery is consumed by the radios.
What I think is valuable on the battery screen is the graph, particularly the large graph where it shows when you had WiFi on, when you had a good or bad signal, when the screen was on, and when the phone was awake. This is were you will see the best correlation between battery consumption and your usage.