Speedometer functions

[Mrwaug]

I have been watching the analog speedometer in normal mode, and have noticed that it is relaying additional information other than just speed. The leading edge "shines" a light green when you are in a light throttle " Eco" condition, and is more blue when accelerating. That much i have been able to figure out. The leading edge also has a solid line across it that will lag behind the leading edge when accelerating, the more you put your foot into it, the more this line lagges behind. I first noticed this while running through the gears in manual shift mode. I'm trying to figure out if this is a measurement of boost or possibly an indication of shift points. Any thoughts on this?