Can you provide some links to the discussions mentioning? I would like to have a few for reference.
One thought as it relates to your question - if the gmac provides shorter passages, they will provide harder questions in order to keep the integrity of the test.
So I think you will have a bit of a catch 22 since most of the shorter passages are easier ones.
My suggestion would be to practice the harder passages regardless of the length.
Posted from my mobile device.
Founder of GMAT Club
Just starting out with GMAT? Start here... | Want to know your GMAT Score? Try GMAT Score Estimator
Need GMAT Book Recommendations? Best GMAT Books
Co-author of the GMAT Club tests
Have a blog? Feature it on GMAT Club!
Get the best GMAT Prep Resources with GMAT Club Premium Membership