The OE pads are pretty good all things considered. Not excellent at anything though. I found the OE pads to do OK on a not so brake heavy track.
I think Chriszeh demonstrated that the OE brake system cannot withstand high heat and repeat abuse.
2015 F34 328iX GT Glacier Silver
2011 E90 M3 Monte Carlo Blue
2004 E46 M3 Imola Red