Hi Everyone,
There are definitely some pretty challenging new problems in OG13! But overall, the new problems fit in pretty well with what was in OG12. Remember that every "new" GMAT problem is just a Frankenstein built out of old GMAT problems (or perhaps I should say "Frankenstein's
monster built out of old GMAT problems" for those of you who are picky about your literary references). The new OG13 problems for the most part just mirror the same topics that have always been tested on the GMAT.
I think the main point to remember is that the actual test is computer-adaptive, so any time you pick out a handful of OG problems you'll be lacking that key ingredient of the experience. Getting a low percentage correct on a randomly selected set of OG problems should never be taken as any kind of score indicator.
Don't let the new problems stress you out, but they are good problems so give them a shot and then focus on learning what you can from them. Even after the June 5th introduction of IR, the main Quant and Verbal sections will not be changing at all (otherwise, the GMAT would cease to be a true *standardized* test). So at the end of the day, don't read too much into the "new" problems in OG13.
Good luck!
Mark