Prius Sales Surpass 500,000

The growth rate for the sales of the Prius will grow over 16% this year. Though the growth rate is slowing, it's due to Toyota's inability to keep up with demand and not a decreased interest in the Prius.

The article says that the only other "mainstream" vehicle that has a similar growth rate is the Mini Cooper.

The article also points out that due to the 2nd battery hybrids require, that takes away some of the environmental benefits of hybrids.