I just received my 15" 2.6/16/1 TB/750 M. I noticed the battery levels fluctuates (+/- 20 to 40 minutes). Are other Haswell rMBP owners seeing their battery drain faster with Google Chrome? I only have 5 tabs open. When I close a tab, the battery level increases by 15 minutes! In the Mavericks forum, there are posts about the known bug about Google Chrome helper not responding.