Unfortunately, not so
Unfortunately, most AVCHD camcorders today that support this 24P framerate actually do the same thing HDV camcorders do: record it to AVCHD file in 60i by telecine-ing. On first thought, it makes absolutely no sense, however this is the reality.
The possible reasoning behind this is so that consumers who record in 'Movie mode' can still watch their videos on standard-definition TVs using built-in D/A converter and composite NTSC A/V output (yellow-white-red). Since NTSC has to be 60i, that's how 24P is encoded.
For those with HDTVs and HDMI, most modern HDTVs can detect 24p frames in the 60i fields and properly decode the telecine cadence, displaying exactly 24 progressive full frames.
Obviously, for editing in true 24P, we have to go through the song-and-dance routine of inverse telecine.