I've noticed a huge discrepancy in testing just here in Virginia. Granted, I was only testing BLS, but here's my story thus far:
My first test, I scored a 95% on the written, aced the medical, and failed my trauma station. Why? We ran out of time. Why did we run out of time? Well, it was because my partner didn't show, so the person I got paired with didn't know that a pediatric cervical collar would probably not be big enough for a guy who was 6'4" (even after I told him several times to just grab the other collar), and also didn't know how to do a proper sling to splint his arm (I ended up having him take stabilization so I could do it for him.) We went over by 44 seconds.
So, I got my national cert, and just planned on retesting with my partner, who tested later and failed the same segment. Well, he flaked twice more on me for retesting, so I finally decided to take it upon myself to retest alone, with another random partner.
During her medial practical (I was a blind assist) she tried to give nitro to a woman that didn't have any of her own (BLS, I remind you) and forgot half of SAMPLE. She passed.
During my trauma scenario, I was so nervous about not having done a test scenario in months (been working off my national until then) and having just witnessed this boob try to test, I myself forgot to check the patient's A&O, and she again forgot SAMPLE even after I told her and didn't realize it until I was done.
I too passed.
So really, I think it depends on the person you get as a tester, and how anal retentive he/she is about certain things.
/long rambling story end