Don't worry. I started last week with crack the dat pat, and here are my scores:
#1: 20 - took 1.5 hours to do
#2: 18 - didn't finish went by 40 mins
#3: 20 - went over by 10 minutes
#4: 18 - was really tired, but finished about 3 minutes early. I got 5 right on the angles!!! and 7 right on hole punching.
#5: 21 - finished with about 12 minutes left (I never thought this would happen!!! I was so worried about running out of time). I had to go back and review the angles and made a few changes
I think if you practice you brain will kinda just get use to PAT. It is funny, cause people have posted the same statement and I was like...um, yeah, your brain. However, trust me, when you practice, you will get better.