Saying things like "I shoot alot of low light" doesnt mean anything really...
...I for one hardly take my flash with me - the camera takes great pictures in low light with some help from lightroom, but getting it to focus sometimes is a problem.
so....what IS low light to you? are you approaching the EV limits of the AF system, or well within them? These tests are all are very enagaing, but if we could express the level of light in terms of the EV numbering system understood by the photography world, it would be more meaningful. Can someone please explain to me why this is either difficult or unattractive?
Most of the the tests in the video were reasonably done. For example, the guys did a good job of exposing the "snappy" (5D3) versus "heasitant" (D800) AF in the studio, which was revealing, to be sure, especially when acknowledged by the confessed Nikon shooter. Notice he didn't even say anything like "when side by side there is really no important difference", as he did in the shadow DR comparison. for the studio lighting condition the AF performance of the 5D3 was a definate, measureable, and meaningful advantage in real situations.
The low light focusing shootout was disapointing to me because it didn't really test the capabilities of the AF system's thesmselves in low light. All they did was point out that the D800 has an AF assist capability that is useful at reasonable portrait distances when the visible AF assist light is acceptable. Good information, to be sure, but low-light shooters don't necessarily want visible AF assist! What they should have tested is situations where AF assist is either impossible (due to distance) or undesired.
Back to the subject at hand, are you all saying that the 5D3's AF performance in low light (without flash attached) isn't commensurate with the situation, i.e. shutter speeds that would be typical, subject movement etc? Unless I've missed something, the only consistent performance issue meaningfully described here is that camera does not utilize the AF-assist beam from the flash very well.