Acer practice umat exams 2013

[muscle min]

Hi guys,

I've often heard that the official practice exams that are put up by acer are a lot easier than the actual umat and hence fairly useless in providing a good indication of how you're going. I have tried a few past years' acer umat exams (pre 2013) and I do agree that those are significantly easier than medentry exams. However, having just completed both 2013 acer practice exams, I find that their difficulty is almost on par with medentry. (I've completed every medentry drill and all 12 exams) Any thoughts from people who have done them?
 

On a side note, what scores should I be achieving in both medentry and acer exams in order to do reasonably well in the actual umat? (2 days away, good luck to all)