Below is a link to a fantastic article about Spreed written by Michael Tipper a professional speed reading coach based out of the UK. Michael sums up spreed perfectly and has put together an instructional video on how to read using clusters.
The educational component of Spreed is very important as it is a departure from the way we have all been taught to read. Although you may not get it the first time, the learning curve is very high and in no time you will begin realizing the advantages of reading at high speeds and comprehending/retaining more of the article. Here is an exerpt from his article.
Now when you try this out for yourself you may find it feels a little strange.That is because you are not used to taking in words in this fashion, however with a little perserverence you will get used to it and you will start to reap the benefits immediately.
Here is the instructional video Michael put together: