The speed of reading a text depends on many factors, including the ability of the reader. However, reading faster is not always reading better or reading more.
It is usually considered that the average speed of a reading will depend on the purposes for which it is done, for example:
To memorize what was read. It is usually read more slowly: less than 100 words per minute.
Learning. A more standard reading, such as an informative one on any topic, runs between 100 and 200 words per minute.
Leisure or relaxed. A more relaxed recreational reading can range from 200 to 400 words per minute.