So here s the answer from Canon:
“All of the current consumer high definition models use a true
progressive CMOS sensor. The 24p will shoot at 23.97 fps. Progressive
video that is recorded with the consumer high definition camcorders is
still recorded into an interlaced “wrapper” so that the video is fully
compatible with normal consumer AVCHD editing solutions. You will still
need to de interlace this video to utilize the true progressive footage.
Image “tearing” may still happen during fast motion or panning due to
the heavy compression that is used with all consumer high definition
video formats. The best way to reduce image tearing is to slow down when
you are panning.”
Thanks again for the help provided in this forum. Its a grat source of information,keep the good work.Regards.Manuel