I scored 20, 21, and 20 on Topscore tests, and my real DAT PAT was a 16.
I totally did not expect that. THe angles were sooo much harder. Most of the angles were obtuse on the real deal, where Topscore angles were mostly acute. FOr me, the acute angles are way easy to compare.
Also, the key holes had more complicated shapes on the real test. Cubes were about the same. I suck at folding, so I can't really give you much input there.
It seems like SDNers have had great luck with DAT Achiever. I think you should try it. PLus its like $10 cheaper