“Some bit of software within Mountain Lion indeed appears to noticeably reduce battery life for Apple’s portable Macs,” Chris Foresman reports for Ars Technica.

“Following on numerous reports lodged in Apple’s support forums, we did some additional testing using our Retina MacBook Pro review unit, which seemed to lose approximately 38 percent of its previous 8-hour runtime after installing Mountain Lion,” Foresman reports. “Apple support technicians are continuing to gather evidence from users reporting problems, though at least one user has been told that an update from the Mac App Store should address the issue.”

Foresman reports, “Following our coverage, several Ars readers confirmed via comments and tweets that they were experiencing similar problems. But some claimed that their battery life under Mountain Lion is as good as or better than it was under Lion, so the problem does not appear to affect all users.”

Read more in the full article here.

MacDailyNews Take: 10.8.1. With history as our guide, it’ll be coming soon.

OS X 10.8 Mountain Lion was released 14 days ago on July 25, 2012.

Length of time between initial OS X release and first update:

• Mac OS X Lion 10.7: 27 days
(10.7 released on July 20, 2011. 10.7.1 was released on August 16, 2011)

• Mac OS X Snow Leopard: 13 days
(10.6 released on August 28, 2009. 10.6.1 was released on September 10, 2009)

• Mac OS X Leopard: 20 days
(10.5 was released on October 26, 2007. 10.5.1 was released on November 15, 2007)

• Mac OS X Tiger: 17 Days
(10.4 was released on April 29, 2005. 10.4.1 was released on May 16, 2005)

• Mac OS X Panther: 17 days
(10.3 was release on October 24, 2003. 10.3.1 was released on November 10, 2003)

• Mac OS X Jaguar: 25 days
(10.2 was released on August 24, 2002. 10.2.1 was released on September 18, 2002)

• Mac OS X Puma: 48 days
(10.1 was released on September 25, 2001. 10.1.1 was released on November 12, 2001)

• Mac OS X Cheetah: 21 days
(10.0 was released on March 24, 2001. 10.0.1 was released on April 14, 2001)

FYI: Mac OS X Public Beta, the predecessor to Mac OS X 10.0, was released on September 13, 2000.

[Thanks to MacDailyNews Reader “Lynn Weiler” for the heads up.]