No this is not the case. People just think it is because the first graphs have really big changes and the second graphs generally only really small ones First time you get a good roll bank it. Then roll to improve it if you've got the materials.
Ok thank you. I spent several hours last night kitting out my AspX for material mining (no refinery) and hit a ring. After finally working out the nuances of mining (including arriving at my destination without having bought any limpets) I didn't find any arsenic. It seems I need to visit some planet surfaces instead.