No, that's not measurable. That's your estimates based on your usage pattern which changes day to day.
The normal tendency is to buy a tablet, use the hell out of it for a while. Then the novelty wears off and you start using it in a normal pattern, which extends your run time because you are not trying every single thing it has on it.
Do a full charge to 100%. Run it till the warning shows, and then record Time on Battery (Its at the top of the screen in Settings / About Tablet / Battery use). Do this for three days in a row.
Re-Enable those modules and do the same recording for three days.
You will find that there is no real difference. Its all perception, and when you look at the data it disappears.
I have no clue what's wrong with your runtimes.
I get 24 hours and 22 minutes with my usage pattern (recorded by Battery Left), and that includes a lot of Angry Birds play time and web surfing, mail reading.
The most anyone has ever seen in Battery use display is about 12% attributed to the Cell Standby. So how do you claim 25% improvement by saving 12%? That should have been your first clue that your perception was off.