Clearly as everyone here is saying, the bottle neck is not your reading speed. It’s your comprehension speed and perhaps your enjoyment. Perhaps you give yourself permission to linger over some beautiful prose. Your comprehension is going to depend on your intelligence, your memory, your familiarity with the subject and the density of the information. Newspaper articles and ordinary speech are so light in actual content and predictable in structure that you can finish their sentences for them.
While I have repeatedly expressed skepticism about the promises of speed reading, I do believe that there are people who can consume text at over 1000wpm and retain the info. But this founded on a very high intelligence.
An anecdote about Fischer. Bobby wasn’t born knowing chess nor was he good at it when he started. He worked hard for many years even to become strong but he didn’t stop there.
This was an American chess master player who had won an important tournament. He showed the “score” to Fischer. This was a list of 30-40 moves in chess notation 1.e4 e5 2. Nf3… Strong players can actually replay a game in their heads from such a score.
Bobby apparently just glanced at it and handed it right back. Saying “Nice”. The master was miffed, “Gee Bobby, I’m proud of that game. I’d appreciate it if you looked at it.” To which Fischer replied, “I did. You missed a win on move 25”, and rattles off the combination.
He must have read that score the way you or I would read a single English sentence. It just came right off the paper into his brain without even being aware of the process of reading.