Yes, although making a significant difference in your reading speed is going to take time - probably several months at least.
How is your reading speed on RC - is it also slower there?
And one more question: you said you had read my "page." The second article that I gave you in my last post has links to at least 10 other articles. Did you follow all of those links and study all of those question types / strategies?
Next, there are speed-reading courses available - you can do some research to find one that's right for you. I took one while I was in university and it was very helpful. If you live near a university or a community college, check out their course offerings. (I took mine at a local community college because my university didn't offer it.)
You can also use articles from the following sources to practice:
http://magazine.uchicago.edu/http://harvardmagazine.com/http://sciam.com/Give yourself an artificial time limit - much shorter than it would take to really read the whole article (or just pick out several paragraphs from an article). Practice figuring out how to decipher the important details from the less important ones. How do you know where you should focus your attention and how can you tell which parts you can ignore or pay less attention to?
Read like this for 15 to 20 minutes every day for the next couple of months at least. When you're done reading, stop and summarize to yourself aloud what you just read and what the main points or main ideas were. Then go back and re-read the same material at your leisure (taking as much time as you want) and ask yourself whether you did get the main points, or whether you missed any. Also ask yourself whether you identified something as a main idea but you now recognize that it was just a detail - and you shouldn't have paid so much attention to it the first time. Then ask yourself how you should have figured that out when you were reading quickly the first time around.
You may also want to look at some of my RC articles, where I talk about this "what to read and what not to read" concept in more detail.
https://www.manhattangmat.com/blog/inde ... rehension/