People can skim at faster rates than they can when reading with full comprehension, but then their comprehension will suffer. You can learn to skim, to take notes, to get quick overviews of whatever you're reading by noting things like chapter and section headings and by reading for the main ideas of sections and paragraphs.
These are all useful skills. But they are a far cry from being to read every single word in the text with full comprehension, and doing that at a significantly faster rate than normal. This latter achievement is something there is little or no evidence of.
Some would say this is impossible and unnecessary.