All I can say is that the last release had no changes that could have such effect. So if you didn't see such problems with previous release, it's very unlikely because of ProfileMatic.

There has been just a couple users who thought ProfileMatic would have effect on battery life. But either the problem was somewhere else or the user did not follow-up with more information to pinpoint the problem. Personally I haven't seen such problems.

It's also good to keep in mind that when N9's battery starts getting old, it can rapidly decrease in battery life. My workfriend's little over year old N9 started to be in state where it had to be charged twice a day.