The number thing is a bit strange. But we'll soon get used to it I guess. Many consumers dont know what a MHz is anyway, and buy ready made PCs from large electrical retail outlets who just group them as 'low-(can run MS word)', 'medium-(can run MS excel)' and 'high-end (can run games ie chess2000 or solitaire)'.
As far as I understand it, they want to group all 'Mobile Pentiums' as 7xx, all P4s with HT as 5xx, and all Celerons as 3xx. So they're classed in terms of family rather than performance. The last two numbers
are incremental, so a 540 is better than a 520. But the gap in performance between a 560 and a 540 may not be the same as the gap between a 540 and a 520.
Its probably to bring it in line with the numbering for their motherboard chipsets or something. Most people will find it much harder. PC adverts were always in terms of GHz and 165x speed DVD-Rewriters and not motherboard chipsets! But the average person has always been screwed when it comes to computer hardware definitions, that is until they change their minds and bring out the Intel Good, Intel Better and Intel Bestest!
