A lot of the time it seems like a time suck to go back and find every AC in the passage
Exactly. You should avoid checking
every answer choice. The biggest difference between masters and folks who are "pretty good" at RC is not the speed at which they read the passages -- it's the speed at which they eliminate answer choices.
My goal when working through these problems is to make as many problems as possible 2-choice or 3-choice problems. Very rarely is a problem actually a legitimate 5-choice spread.
How? By eliminating answers based on what I know about the BIG PICTURE of the author's position. For those of you using our strategy guides, you know that the foundation of our approach is building a mental picture of the Scale -- the two sides at issue, and where the author stands.
This is not a rote activity, to be checked off, completed, and then forgotten. It's the bedrock of the THOUGHT PROCESS we use to answer questions correctly.
Most of these questions have 2 or 3 answer choices that can be eliminated immediately because they place the author's opinion on the wrong side.
Another important consideration is the speed at which you approach the
other questions in the section. Sometimes, you will have to go back and dig around in the passage. Sometimes, you'll have to do that for 4 or 5 choices.
It's of utmost importance, then, that you absolutely maximize your speed on all other, easier, simpler questions. If you waste 5 seconds per choice double-checking something that you do not need to double check, and you do that on 4 questions, you have wasted almost
TWO MINUTES that you could have used on more complex or work-intensive problems such as the ones you are describing.
You need not worry so much about going faster on hard questions if you go as fast as you really can on easy ones!