I've read a lot of people saying the E-Revo has the same transmission as the E-Maxx, but on the press release they mention a "brushless-ready 2-speed transmission with metal center idler gear." That sounds to me like it comes with a 2-speed out of the box. The E-Maxx, on the other hand, has an "all-new single speed transmission (2-Speed optional)" (emphasis added). Sounds cool to me! It's odd that a lot of people say you don't need a 2-speed with electric, but this should make things interesting. Are there any disadvantages to having a 2-speed?