AAMC official CARS question pack... is it really this hard..?

So I am about 2 weeks out from taking my mcat (sept 3), and have been doing TPR's practice exams for prep. I have been scoring around 126-7 on their CARS section, and numerous people have told me that TPR's CARS is wayyy harder than AAMC's would be on the real deal. Anyways, I bought the AAMC's official guide and completed the 6 practice CARS passages they provided, and was happy with my score (~90%). Yesterday, I tapped into the 'AAMC official Qpack' for CARS (pack 1), and am astonished at...

AAMC official CARS question pack... is it really this hard..?