Nice shot and great Bokeh. I am surprise that the EOS M can capture this shot as the animal should be moving and I notice that the eos m when using with the adaptor seems to be a little slower on focusing than when it is with the ef-m lens.
Not really, depend on lens. Eg EF 40 stm with adapter could be slightly faster than EF-M 22 stm. Again, EF-M 22 is the slowest amongst 3 native EF-M lenses currently available.