THis is what's strange about this problem;
1. Many never see it
2. Many saw it going from Snow Leopard to LION
3. Some Saw it going to ML from SL or ML
4. The MAC itself doesn't indicate anywhere what the cause is (the strangest part). If there's a "rouge" program - why does it run fine on some o/s's and not others?
5. Some people can fix (temporarily) with the usual SMC/PRAM resets (without changing anything else)
6. Some can downgrade and fix their problem.
The pattern is in the few patterns. If Apple did a better job of telling your where your resources were going then all would be well. MY Android S3 tells me who's using the battery so I guess the MAC could do!!
And yes, even people with new machines.
http://www.google.com/#q=apple+lion...cp.r_qf.&fp=a63d496e947e2bd4&biw=1582&bih=846
I have not seen any problems whatsoever in regards to battery in neither Lion nor Mountain Lion. This experience is based on two MacBooks and two MacBook Airs.
It may not be a case of mysterious Internet people, but of the apps they install. People writing reviews for websites will undoubtedly have many apps installed and have tinkered with their systems. When someone from a reputable site opens a MacBook straight from the box and sees battery problems, let us know.