Firstly clean up your language when you post - apart from the run-on sentences I noticed you used "tuff" to mean "tough". I might sound a bit catholic in my advice but I have figured it is a good way only to be taken seriously but also polish your own verbal skills
Sorry if I am blunt but just trying to help you here.
Some points:
1. Accuracy doesn't really matter - it is what you learn that matters. So to give a number like 70% of 80% doesn't really work. What works is that at the end of OG you are confident/comfortable with RC.
2. Also I am assuming that while you are solving the questions your accuracy is actually increasing so you should be taking a weighted average instead of just mean.
3. Another factor which skews this analysis is that the questions are graded from easy to hard on the OG. So a higher accuracy early on is not as good as a lower accuracy later on. Also curious to know who said OG RCs are not representative of the actual GMAT difficulty?
Adding to the above factors some more points you want to know about RC:
1. There is a huge shift between solving stand-alone passages to solving questions on the test. Try to see how you do on RC on the practice tests.
2. RC passages in OG have around 6-8 questions. On the actual test you will get around 3-4 questions. Remember this difference.
3. Timing is paramount in RC (not just accuracy) as a few minutes saved here can help you on tougher questions elsewhere. This is why I recommend that you should spend no more than 6-8 minutes per passage (including answering 3-4 questions).
HTH,
Arun
