Do speed reading courses work?

I was thinking about bettering myself in this area by taking a course although wondered what folks thought?I found a website yesterday with an on line test and I scored 586 words per minute and 82% accuracy on the comprehension afterwards to test how much I'd retained. According to their ratings this already put me towards expert level so am not sure if it's worth trying to do any more.Anyone else experience / recommendations with speed reading?Olu OdeniyiBusiness Referral Club Creating real business opportunitiesReducing cost, removing pain with Online Backup, Virtual Switchboards & Virtual Call Centres - Your online African business network