The EOS-M does have a hhybrid AF system AFAIK---see
imaging-resource--quote below.
http://www.imaging-resource.com/PRODS/canon-eos-m/canon-eos-mA.HTM
Just doesn't seem to do the job well enough yet.
"Like the Canon Rebel T4i before it, the Canon EOS M offers on-chip
phase detection autofocus from the main image sensor, or Hybrid CMOS AF
in Canon parlance. The system, used both for still and movie capture,
combines phase detection and contrast detection when the subject is
near the center of the image frame, and uses only contrast detection
when the subject strays outside this area. When phase detection is
used, it's only to determine the focus direction and get focus in the
ballpark; focus is always fine-tuned with contrast detection towards
the end of AF operation."
Mike
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