Since I upgraded to Mavericks I've been watching battery life (hoping for an improvement) and it does feel like it's draining quicker now. But in reality I'm s

Since I upgraded to Mavericks I've been watching battery life (hoping for an improvement) and it does feel like it's draining quicker now. But in reality I'm sure this is just because I'm watching it more closely than I ever did before. I have no quantitive measure of how battery life has changed for me. I suspect this is a common problem when you announce that an upgrade improves something like battery life. All of a sudden users start looking when they didn't really look before and report issues based on feelings. Of course this doesn't apply so much for users who're now reporting 'service battery' warnings on new batteries...