The price seems a bit steep for the service. Maybe they should tinker with the pricing of data rates to off set this issue. My data rates have been extremely fast over the past year. I went from 6Mbps to 10+Mbps without paying any additional fees.
I was aware of the "Speedboost". The speedtests that were run use large files so they are not swayed by the "boost". Many use a "Speedo" type dial that shows in progress.