Despite the fact that all of Apple’s iPhone OS devices use similar ARM processors, the second-generation iPod touch has been revealed as the fastest model thanks to a boost in speed from 412MHz to 532MHz. Thomas Fessler, CEO of Handheld Games Corp, has said that the performance of its TouchSports Tennis game is noticeably different across models, with the second-generation iPod touch being the fastest “by far.” Speaking with Touch…