Here is a reply I got from FormulaFriction when I mentioned that the EBC yellow stuff pads getting cooked after one track day.
"The EBC yellow stuff has got about a 950 degree heat rating! If you want to you can double check it on the EBC website (www.ebcbrakes.com)! I definitely do think the yellow stuff with the heat treated and slotted discs will work but I would suggest doing the same all round as you will get the ultimate performance from the braking system! The nice thing is the yellow stuff is a half track half street pad!"