Hi Elmo27
Practice CAT scores are only as realistic as YOU make the process of taking the CAT. The more the 'CAT-taking event' deviates from what you'll face on Test Day, the more likely the score is to be inaccurate (and in most cases, that means "inflated").
Here are just some details to consider: When you take a CAT...
1) Did you take the ENTIRE CAT (including the Essay and IR sections)?
2) Did you take it at home?
3) Did you take it at the same time of day as your Official GMAT?
4) Did you do ANYTHING during the CAT that you couldn't do on Test Day (pause the CAT, listen to music, etc.)?
5) Were you taking a CAT that you had previously taken?
Since you posted in this thread, is it safe to assume that you're still studying for the GMAT?
GMAT assassins aren't born, they're made,
Rich