First and foremost, please provide a link to the post you are referencing.
Secondly, I recall reading a post on here in which the person said he saw an identical problem on the gmat that he remembered from either OG12
or the OG quant
book. I don't think I would rely on one person's experience to mold my prep strategy... I agree with the above poster - solidify your fundamentals and things should be okay. It wouldn't hurt to be very familiar with OG12
-like questions but to memorize them, I think, is pointless.
Like I said, on my actual GMAT many of the quant problems were virtual replicas of problems I saw in OG.
the link is from another website and I can't post it because I haven't been here 5 days yet, I get back when I can