I have a Tecra 9100 Pentium M 2 Ghz. I am happy with performance and have been holding off on additional purchases because "Centrino" plunged processor speeds back to 1.5 Ghz for two years. I have heard a rumor that lower speed Centrinos were faster than higher Ghz original Pentium Ms. Now that we have Centrino Pentium Ms (Sonoma ?) - I am confused on what I should expect for performance. I understand that the mother board is much more capable and faster memory - that's very nice - but is the raw processor speed the same? Thanks, D.