I just posted this in the comments section of my article, but it's important enough that I wanted to add it here. Larry just emailed me again about the idioms issue.
Two very important things (the first from Larry, the second from me):
(1) Larry just got back into the office and was able to check on some of these idiom issues (he was traveling earlier this week). He was able to clarify that American-centric idioms and expressions are the ones that they have dropped / been dropping. Idioms that are not American-centric are still in. That's all he's told me so far - he said "more to come" in his email. I'll let you know when I have more.
This, of course, begs the question: which ones are American-centric and which ones aren't? Unfortunately, there isn't a definitive list of the idioms which do get tested (and there are thousands of idioms in the language), so we can't just point and say "study this, don't study that." My guess is that the ones that we see in OG12 have probably already been mostly stripped of American-centric idioms, because they published that after they decided to start getting rid of the American-centric stuff.
So the lesson there is to study what you see in official questions (which, interestingly, was what we already said before because there are, as we've noted, so many idioms in the language). Also - if you have learned non-American English (British English, for example) and see something where you think "really? I thought that was <something else that you learned>" - then ignore that one.
(2) We've been saying that these aren't *major* changes, though they are news and we do want to take action. In particular, meaning has always been there - it's just that there are proportionally more questions now. If you have been studying meaning, then you should be okay whether you have to answer 3 or 5 or 8 questions that hinge on meaning. (Note - I'm making those numbers up - we don't know how many questions will test meaning.) And meaning has been on GMATPrep CATs and other CATs as well, so you have been seeing meaning issues when you take CATs.
If you have been neglecting meaning... then you have some work to do. But that would've been the case even if they hadn't said they've got more questions that revolve around meaning now.
And re: the idioms, see above.
