Only getting 5h10 min on my macbook pro 15" after update...
EDIT: few minutes later: 4h25 when only surfing the web
Which software is your battery sucker? It could be a process running in the background that is not yet optimized for Sierra. E.g. Adobe lets a lot of things run in the background. Or if you use Chrome for browsing, it can eat up a lot of battery quickly, depending how you configured it.