Just read this interesting debate over the Mhz myth and why us Mac users have been waiting for speed-bumped chips from motorola. The writer raises some interesting points that sound quite plausible regarding where motorola has gone wrong with their development process.
http://www.geek.com/procspec/newsletter/nlproc01162002.htm
http://www.geek.com/procspec/newsletter/nlproc01162002.htm