To answer your questions on the forum also in this way, here it is:
I use CloneCD version 18.104.22.168
I use princo cd's, but that's not important since the cd's I backup are originals most of the time(yes I have my contacts :))
But if I copy a copy of a safedisc protected game I have no problem at all either. Ten minutes at most. If it contains music it might take a bit longer, up to 30 minutes.
I have a Plextor 412C. Which read at 12x max and burns at 4 speed. Quiet an old burner, but Plextor and so of the best quality.
For safedisc protected games I use no other program then clonecd.
So the only thing I can think of, is that it is either your burner or your clonecd version.
Maybe your burner just can't handle errors very well or your clonecd version isn't working correct with your burner in respect to the error skipping.
Also make sure when you use fast error skip, put the setting of error correction on software, hardware correcting might not be supported or very slow.
That's all I can think off.