Why DVD reads VCD slow?



Is it normal for my toshiba sd-m1302-1006 that it reads a 80 minute video-cd in about 12 minutes en supervideo-cd's in about 3minutes??:confused: :confused:

everything else would be read a normal speed.

I just find 12 minutes for a videocd is a bit long.
in my brothers lite-on DVD it takes just +/- 3 minutes.