I own a Canon XL1s. It does not run at 24 fps. There are standard PAL and NTSC models of this camera as usual. It's the same with the GL1 (the PAL version of GL1 is called XM1). What's unique to these cameras is that they all have the so called movie mode (a.k.a. progressive mode).

Normally a video camera is operating in so called interlaced mode. For PAL this means that the camera actually records 50 fields a second (NTSC: 60). A complete frame consists of two fields, even and odd (or lower and upper). On a lower field the even rows of pixels (rows 2, 4, 6, and so on) are stored. And on the upper field the rows 1, 3, 5 and so on are stroed. (hope i got those the right way anyway, you get the picture (pun intended))...

However, in the movie mode the (PAL) camera records 25 full frames per second which is pretty close to what film cameras do.
When this is played back on a normal TV it gives the film like feel. Usually DV cameras do not have this progressive mode, or if they do they're not capturing the frames at full framerate.